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1. 45 MMU DATA STRUCTURE 46 TECHNICAL SPECIFICATIONS 49 INTRODUCTION 1 INTRODUCTION Growing interest in data communication in recent years has resulted in an increasing demand for the required hardware Consequently the use of multiple modem systems within companies is also escalating To facilitate the management of these modems in a simple and efficient manner TRON supply a Modem Management System suitable for 19 Modem Racks 19 Modem Rack Backplane Terminal Each 19 Modem Rack can accommodate 16 special card modems To permit central management of these modems the rack can be equipped with a Management Module or MMU This module and the modems are powered by a central double power supply INTRODUCTION The Modem Management Unit fulfils the following functions Configuration The configuration of the modems is set in the MMU The modems are configured automatically when they are inserted into the rack A total of 10 different configurations can be defined Control Overview of the current status of the modems Transmission of SNMP traps to a management station Security A Call back security option is available See Auto dialback chapter Logging All connections made via the modems are logged together with all instances of the system being turned on and off and the ins
2. RECORD speed ENUMERATE R 3 X 1 300 1200 2400 4800 9600 19200 38400 57600 115200 auto config ENUMERATE off on 3 2 initstring A CHARSTRING R 3 X 3 initstring B CHARSTRING 3 4 initstring CHARSTRING R 3 X 5 initstring D CHARSTRING R 3 X 6 initstring E CHARSTRING 3 7 initstring CHARSTRING R 3 X 8 initstring CHARSTRING R 3 X 9 initstring CHARSTRING R 3 X 10 initstring 1 CHARSTRING R 3 X 11 initstring J CHARSTRING R 3 X 12 auto line busy ENUMERATE off on R 3 X 13 delay INTEGER R 3 X 14 initialize FUNCTION 1 R 3 X 15 upload new software FUNCTION R 3 X 16 management ARRAY 20 R 4 H RECORD name CHARSTRING R 4 X 1 password PASSWORD R 4 X 2 user class ENUMERATE supervisor manager 1 R 4 X 3 ADB editor technician autodialback ARRAY 2000 R 5 H RECORD name CHARSTRING 1 5 1 password PASSWORD R 5 X 2 areacode CHARSTRING R 5 X 3 telephone LONGINTEGER R 5 X 4 group ENUMERATE group 1 group 2 group 3 R 5 X 5 group 4 group 5 group 6 group 7 group 8 group 9 group 10 logfile ARRAY 8000 R 6 RECORD event LOGFILE_INTEGER R 6 X 1 to previous rack FUNCTION R 7 H to next rack FUNCTION 1 R 8 H logout FUNCTION R 9 H 48 Technical specifications Appendix 5 Technical specifications The MultiTRON can contai
3. command 0851 2 3 3 0 van modem 3 response 080 power off 30 5 MMU Commands Function A function is activated by means of the Set command A value must be given in this case but is not however used Example command 09S1 8 Hello switch to rack 2 response 090 l Password The Password can be changed in two different manners A 5 6 The new password can be entered as a string This is then coded into an integer in the Management Module and stored command 105S2 4 3 2 Secret password for manager 3 response 100 in rack 2 The password can be coded i e entered as an integer In this case an i has to be substituted for the command 1152 4 3 21 53956 password for manager 3 response 110 in rack 2 Error messages If a command string cannot be translated or executed the Management Module will send an error message in response This response contains the Message number the letter F and a string with the error number and an explanatory text In some cases a character follows followed by supplementary information Example see appendix for an overview of error messages command 12invalid response 12F7undefined command command 1359 8 7 6 5 response 13Fracknumber is not current 2 31 8 Software upgrade 6 SNMP The MMU also possesses an option for sending traps Traps serve to report serious errors immediately The traps are sent to the S
4. The power consumed by 1 rack with 16 modems in full operation amounts to approximately 75 WATT 49 Technical specifications Connectors DB9 female connector on the front of the MMU 19200 BPS Terminal connection cpm cc uem Signal Ground Transmitted data Received data Request to send Clear to send Data set ready Data terminal ready Data set ready not connected These two signals are coupled in this connector DB9 female connector on the rear of the rack uppermost connector 115200 BPS Terminal connection Signal Ground Transmitted data Received data Request to send Clear to send Data set ready Data terminal ready Data set ready 10 volt These two signals are coupled in this connector DB9 male connector on the rear of the rack lowest connector 115200 BPS Modem connection Signal Ground Transmitted data Received data Request to send Clear to send 10 Volt Data terminal ready Data carrier detect 10 volt 50
5. MMU Commands 5 2 Database The structure of the data in the Database is built up from several basic structure types that couples the data together A Array R Record The data can be of the following types Character String Integer 0 65535 L Long I nteger 0 429496296 E Enumerated 0 65535 D Function H Log File compressed to I nteger P Password coded to Integer Record A record also contains a list of values Each value has a name The values that a record contains are described in the structure these can be called up using the TYPE command Array An array contains a series of values or records Each value has its own serial number The number of values is contained in the structure and can be called up using the TYPE command Enumerated A variable of the enumerated type is an Index number This index selects one string from the string list contained in the structure which belongs to the enumerated type This string can be called up using the TYPE command Function A variable of the function type contains no relevant value By addressing this variable however the corresponding function is called up This could be the resetting of a modem for example Log File The events logged in MMU are compressed into an integer following which they are stored in data elements of the Log File type Password Passwords are coded into an inter using a special algorithm This integer is then
6. group 9 group 10 state ENUMERATE available reserved online online not installed 2 2 power ENUMERATE off on 2 3 f busy ENUMERATE R 2 X 4 mode ENUMERATE 1 2 5 Bell 103 Bell 212A Bell 208 V21 V22 V22bis V23 V26A V26bis V27ter V29 V17 V32 V32bis V32 TCM V33 VFC V34 V34bis bps ENUMERATE R 2 X 6 300 600 1200 1275 2400 4800 7200 9600 12000 14400 16800 19200 21600 24000 26400 28800 30000 31200 32400 33600 34800 36000 37200 38400 disconnect reason ENUMERATEb R 2 X 7 normal 2 3 carrier loss no EC at remote no feature negot response remote is sync only framing incompatible no protocol in common bad feature negot response no sync info from remote normal initiated by remote retransmission limit reached protocol violation inactivity timeout no dialtone no answer busy key abort failed to connect error correction ENUMERATE 2 8 none lapm mnp4 mnp5 V42bis lapm V42bis mnp4 quality INTEGER R 2 X 9 signals INTEGER R 2 X 10 reset ENUMERATE not active resetting R 2 X 11 factory reset ENUMERATE R 2 X 12 not active resetting initialize FUNCTION R 2 X 13 analyse serial connection R 2 X 14 RECORD analyse TXD FUNCTION R 2 X 14 1 analyse RXD FUNCTION R 2 X 14 2 direct connect FUNCTION R 2 X 15 y 47 MMU Data structure group ARRAY 10 1
7. a previous menu from the submenus by pressing ESC or 0 ENTER Using the and keys you can move directly to the following previous submenu or move to the following page when the current menu is a table When entering data e g a group number or string the change can be undone by pressing lt 5 gt When nothing is entered and ENTER is pressed a default value is filled in The menu structure is described in the following paragraphs 2 MMU Command Mode Communication is then performed by means of commands based on the SNMP protocol See chapter 0 3 1 Terminating the connection Communication with the rack A connection can be terminated from the main menu by selecting 9 logout When logged into the MMU via a modem connected to the male connector on the rear panel of the MMU DTE connection the DTR will give a dip of approximately 1 second immediately on logging off As a result of this the modem will terminate the connection When logged in via one of the other two connectors DCE connections the same applies on the port concerned for DSR and DCD these signals are coupled in the two DCE connections The connection can also be terminated by the hardware When logged into the MMU via a modem connected to the DTE connection the DCD must be made inactive a normally configured modem does this itself once the telephone connection is terminated A logout is then also performed at the same time which in turn results
8. clock events occurring The system clock produced in this manner can then continue without clock events occurring Of course it is also possible that the t part has been counted round more than once between two events In that case a clock event will be found between the two events that will indicate the last and therefore correct value of the y and 2 bits 35 8 Software upgrade As a result of all events being provided with a 32 bit time stamp retrospectively it is therefore possible to establish the time at which each event took place according to the MMU system clock By relating the actual position of the MMU clock to the real time at the moment of downloading the actual time of events in seconds can then be accurately determined The actual position of the MMU clock can be found in the menu in the variable rack advanced system clock As stated previously the MMU places the events into the logfile in succession continuously When the end of the list is reached the list is overwritten from the beginning In the first instance with exception to the extension fields and the clock event 0 is written into bit 7 bit When the list has been filled once and writing has restarted from the beginning of the list a 1 is written in place of a 0 When the system has been switched off for any length of time this bit can be then be used to determine which event was written last and from which point subsequent logging is then to
9. cte nite EY RE 28 5 3 TYPE COMMAND ini iere t exa sated T Re ED LI 29 5 4 ejes 30 5 5 SET COMMAND tc t LEES 30 5 6 ERROR MESSAGES T p ERE 31 6 5 32 7 1 33 7 1 EOGEIEE FORMAT ict 3 itte el cee Sih raed io ema eR pete Ei A eie rete eL Eus ries eos 34 7 2 TEME REGISTRATI ON sesta tee 35 7 3 LOGERILEZDERI NI TIONS rt rione aaa ae scious a 37 8 SOFTWARE UPGRADE 39 8 1 UPLOADING MODEM SOFTWARE LOCAL 24 7 2 2 729 20202022222 39 8 2 UPLOADING MODEM SOFTWARE 7020 1202 2 1 2 2 2 40 8 3 UPLOADING MMU SOFTWARE 1 1 2 3 40 8 4 UPLOADING MMU SOFTWARE 1 0 9 0 20 2227 2222 41 APPENDI X 1 APPENDI X 2 APPENDI X 3 APPENDI X 4 APPENDI X 5 Multi TRON MMU COMMANDS 43 ERROR MESSAGES 44 USER AND 55 5
10. in a DTR dip When logged in via one of the other two connectors DCE connectors the port concerned must also be made inactive This of course also results in a logout which once again results in a DSR DCD dip Communication with the rack 3 2 Main menu The following options are available in the main menu 1 Rack This option selects the submenu for rack specific matters See paragraph 0 Modem This options permits the 16 modems to be addressed individually to establish which group they belong to for example See further paragraph 0 Group This option permits mass configuration for a group of modems A maximum of 10 different groups be defined See paragraph 0 Management This option permits manager names and passwords to be defined or changed for a maximum of 20 managers A class can also be set for each manager see paragraph O In coupled racks you should also ensure that the management list in each rack is identical Auto dialback This option provides you with access to the list of ADB users See chapter 0 Logfile This choice provides you with access to the logfile See chapter O Previous rack This enables you to login to the previous rack that is coupled to the male D 9 connector on the rear panel of the MMU Without you noticing anything further the current rack will log you in to the previous rack using your own name password combination If this name password combination is not known on the rack se
11. on one of the modems in the dial in group The user is requested to enter his name and password The name and password entered are searched for in the auto dialback list and may be in either upper or lower case If racks are coupled a search is made through all the racks present If the search is successful the system reads the telephone number and the number of the dial out group from the auto dialback list The system then determines whether a modem in the selected dial out group is available If that is the case the user is called back via that modem following the elapse of the time set in the group menu of the dial out modem This time must be at least 20 seconds The dial out modem may be located in a different rack to the dial in modem It should be noted that the auto dialback function and the identification of a user are in no way related to logging in and being identified as Manager The number of users in the auto dialback list is dependent on the number of racks coupled A single rack may contain a maximum of 2000 users provided the average length of the user name is no longer than 24 characters If coupled racks are used the number of possible users increases in proportion to the number of racks 21 5 MMU Commands 4 1 Dialling in To use a modem as a dial in modem this should in principle be set in the modem This is set by including the following in the initialisation string Initstring 580 1297 The S80
12. should ensure that that there no modems present in other racks with that group number No modems that can be used to dial in may belong to the dial out group as that would result in a conflict if the management system ever wanted to dial out on a modem receiving an incoming call at the same time 24 5 MMU Commands 4 4 Auto dialback menu option If you select auto dialback in the main menu the beginning of the user list will be displayed Using the Enter key you can scroll through the list continuously If the user number is known the number can be typed in followed by Enter to display the data for that user 1 Name of the user max 64 characters It is assumed that average length is somewhat shorter Password The user s password This is not displayed but can however be entered or changed if the manager has the authority to do so Area code This is the dialling code used for calling back the user This number may be preceded by an international dialling code plus country code and may also contain a comma for a fixed pause or a w for waiting for a dialling tone Maximum length is 12 characters Telephone This is the subscriber number for calling back the user The maximum length of this number is 9 digits and it may begin with zero Group The dial out group of the modem to be used to call back this user 25 5 MMU Commands 5 MMU Commands The abbreviation SNMP stands for Simple Networ
13. 6 modems can take over 1 hour in total During the upgrading of the modems the MMU will remain out of normal operation various functions such as the registration of modems on offline ADB auto configure etc are suspended during the upgrade but resume normal operation when upgrading is completed During the upgrade a response will be received for each modem and following completion each modem upgrade will be recorded in the logfile 8 2 Uploading modem software remote A remote software upload is basically the same as a local upload The MMU should be coupled to an external modem as described in chapter O In this case it is also important that both sides of the telephone connection are configured for modem flow control 8 3 Uploading MMU software local The uploading of new MMU software is achieved with the aid of the program upload exe which can be run on every PC AT or compatible machine It can be found on the TRON BBS in the file area TRON MMU software area 32 This area also contains the new MMU software in a binary file format e g MMXXX BIN To upload the MMU software the program uses the upload new MMU software command in the rack advanced debug info menu The computer must be connected to the connector on the front of the MMU port speed 19200 BPS The MMU software upload is performed as follows 1 Start the program from the DOS prompt upload 1 MMXXX BIN 40 8 Software upgrade The 1 paramet
14. Allied Data TECHNOLOGIES lt gt MultiTRON 19 rack system User Manual Multi TRON Disclaimer This manual by ALLIED DATA TECHNOLOGIES B V hereinafter referred to as ALLIED DATA TECHNOLOGIES is a reflection of the current state of the products described in it It has been our aim to provide a description which would be sufficiently complete and clear to see to it that our products would be as easy as possible to use However this manual may contain technical inaccuracies and typing errors As a result of rapid developments we are also obliged to reserve the right to implement technical modifications and developments without prior notice For this reason ALLIED DATA TECHNOLOGIES does not warrant the contents of the manual and its permanent applicability Neither is ALLIED DATA TECHNOLOGIES liable for possible loss of information or any improper use of information resulting from the consultation of this manual In particular ALLIED DATA TECHNOLOGIES is not liable for any direct or indirect damage including loss of profits and comparable losses resulting from the use or improper use of this manual even if ALLIED DATA TECHNOLOGIES or a representative of ALLIED DATA TECHNOLOGIES has been informed that such damage could arise Of course this does not detract from out legal liability for intentionally inflicted damage or damage on the basis of gross negligence In relation to the information mentioned in this manual ALLIE
15. CII 125 en CR also usually preceded by a CR 26 5 MMU Commands 5 1 Command structure The command and response strings are divided into several data fields and are terminated with a CR Examples of the content of some of these data fields are provided below Number Each string sent begins with a field of two numbers in which a Message number is placed The accompanying responses contain a copy of this field This enables a PC to determine which response corresponds to which command Command The third character of a command string is the Command letter This letter determines the command type T for the Type command G for the Get command and S for the Set command Path The path points to the element in the structure or in the data on which the command is to be executed This path consists of Index numbers separated by dots These represent the choices that have to be made in within the records and or arrays in order to arrive at the element The number is the number of the rack containing the element If this is not the same as the current rack number it will be necessary to first switch to the correct rack the functions To Previous Rack and To Next Rack have been included in the structure for this purpose For example to view the forced busy status of modem 3 in rack 1 the following path is used 1 2 3 4 See appendix for a detailed overview of MMU command structure and data structure 27 5
16. D DATA TECHNOLOGIES does not warrant that there are no industrial rights of ownership trademarks patents etc This also applies to commonly used brand names company names and product names but these are subject to the relevant trademark patent and registered design laws The information is not to be copied translated reproduced or transferred or stored on any electronic medium or other machine neither wholly nor partly without prior permission in writing from ALLIED DATA TECHNOLOGIES The sale and use of software is subject to the ALLIED DATA TECHNOLOGIES General Terms of Delivery and Payment as well as its License Terms Should any term regarding the disclaimer be or become void for legal reasons this will not affect the other terms Allied ata Allied Data Technolgies bv TECHNOLOGIES P O Box 788 NL 3200 AS SPIJKENISSE _ The Netherlands 2003 Allied Data Technologies CopperJet Tornado Trident Tron ADSL Acecat First and Teltron are registered trademarks of ALLIED DATA TECHNOLOGIES B V IBM is a registered trademark of International Business Machines Corp IBM MNP is a registered trademark of Microcom Inc Multi TRON Multi TRON CONTENTS I INTRODUCTION emn 6 2 INSTALLI NG THE 9 2 1 INS TALEING MODEMS onore deos Er d cie a a atate e 9 2 2 COUPLING RACKS 9 2 3 CONNECTING A
17. EM TIMEOUT is sent 22 5 MMU Commands 4 2 Programming the texts Strings 1 to 6 are programmed using modem commands AT P250 to AT P255 The strings may be up to a maximum of 64 characters in length and may also contain a CR a CR LF and an lt 5 gt character These are entered by means of a control character as follows CR M CR LF J ESC I The command is terminated with M immediately followed by the string to be programmed The string is terminated with Z For example In the string P253 M JYou will be called back M Z p253 M Is the command With CR as command terminator J You will called back M Is the string that is sent to the user where J is translated as lt CRLF gt and M as CR Z Is the string terminator and the command for the modem the store the string The ESC character enables support of ANSI escape sequences For example to give the goto home command in the welcome string of the user s ANSI driver string 1 would appear as follows P250 M HWelcome to JPlease enter your password Z In this string is translated to lt esc gt H The control character can also be inserted by entering two s 23 5 MMU Commands The commands can also be placed in the group menu of the modem management system so that the strings are programmed into the modems automatically on initialisation or when being plugged in An ex
18. NMP trap driver by means of a foreign protocol that subsequently transmits them to a management station using SNMP such as HP Openview or NetView for example This SNMP trap driver has been specially written for this application The traps that can be sent by the MMU are 151 word 2nd word 3rd word Category Description 9nrXX 0000 Modem specific Modem out of rack 9nrXX 0001 Modem specific Modem plugged in 9nrXX 0002 Modem specific Modem watchdog reset EOXX 0000 Rack specific Rack power on EOXX 0001 Rack specific MMU plugged in EOXX 0002 Rack specific Watchdog fired int O failed EOXX 0003 Rack specific Watchdog fired int 1 failed EOXX 0004 Rack specific Watchdog fired base context failed EOXX 0005 Rack specific Unimplemented opcode EOXX 0006 Rack specific Rack power down EOXX 0008 Rack specific Power failure 1 EOXX 0009 Rack specific Power failure 2 EOXX 000A Rack specific Power 1 back EOXX 000 Rack specific Power 2 back EOXX 000C Rack specific Link to previous rack broken EOXX 000D Rack specific Link to next rack broken EOXX 000 Rack specific Link to previous rack restored EOXX OOOF Rack specific Link to next rack restored E3XX old new Rack specific Racknumber change rackno rackno The manner in which these traps are sent by the MMU corresponds in general to the command structure described in chapter O 32 8 Software upgrade 7 Logfile The management module stor
19. PC OR TERMINAL opem cee RE RENE UE er TENA pana 10 2 4 CONNECTING A MODEM tie al angen MAR rris Kt EV 10 3 COMMUNICATION WITH THE 11 3 1 TERMINATING THE 6 6 11 3 2 13 3 3 RACK m 14 3 4 MODEM MENU Heo oneri dex einn a Yap CRUS DECUS dit NX D RE 16 3 5 GROUPIMENUS tecto ecce Lune MC LM eic ELLE ELTE 19 3 6 MANAGER MENU isos woes vad ciet Rie UR 20 4 21 4 1 DIALLING ING sina RNS ES es osc tas oe ae cadets 22 4 2 PROGRAMMIING THE TEXTS intonuit dei epe a ca ge Pe de noe AA 23 4 3 DIAEUING OL T os aei xciv ota LEE aot LLLA 24 4 4 AUTO DIALBACK MENU OPTI ON unit e teet Y RE DES eee 25 5 COMMANDS 26 5 1 COMMAND STRUCTURE ee ore edente es eer e Lhasa ben tls 27 5 2 DATABASE dui ect unte bete a PUn t imer ete NE LATER UE
20. XXXXXQXXXXXXX free for future use 1000mmmmaddddddd disconnect reason 1001mmmmqttttttt modem specific events for modem mmmm Is followed by one or more of the following extensions 0000 0000 0000 0000 modem out of rack 0000 0000 0000 0001 modem plugged in 0000 0000 0000 0010 watchdog reset 0000 0000 0000 0011 configuration future 0000 0055 555 mmmm speed amp mode speed lt gt 0 0000 01 eeqq error correction and quality 1010mmmmqttttttt modem mmmm goes online 1011mmmmqttttttt modem mmmm goes offline The strings corresponding to the bit combinations can be downloaded from the MMU using the type command see MMU commands Type enumerated The can be found in the menu under 1100mmmmgsssrrrr ADB request m modem rack of ADB user s status Status 0 ADB user will be called back The ADB user who attempted to login is identified by the racknumber and the usernumber in the following extension code Use the extension code number as the array index in the ADB list of the intended rack 1 System busy The ADB user is identified the same way 2 ADB user unknown In this case there is no extension code and the racknumber is not applicable 1101 5 ADB dial out m Modem Rack of ADB user s Status ADB dial out entries except those with status 1 or 3 have extension code When the status is 1 or 3 the racknumber is not applicable Together with the rack number the exte
21. ample of the groups settings for an auto dialback group is provided below Initstring A 580 1297 Initstring P250 M JWelcome to please enter your name Z Initstring C P251 M JEnter your password Z Initstring D P252 M JYou will be called back M Z Initstring E p253 M JIdentification incorrect M Z Initstring F p254 M JIdentification time elapsed M Z Initstring G p255 M JSystem busy try again M Z Initstring J 50 1 amp DO amp W After setting these strings in the menu for the correct group s the initialisation command can be given in these group s menu option 15 so that the strings are sent to the modem If you make use of multiple dial in modems that are available via different telephone numbers it is possible to program different strings into each modems enabling a text to be displayed to the user in a language that is dependent on the telephone number used 4 3 Dialling out Multiple dial out groups can also be defined so that each user depending on their identification can be connected to a specific system The initialisation string for the dial out modems for a specific group can be set in the group menu When using auto dialback in coupled racks the group setting for the dial out group in each rack should be the same as it is not possible to predict from which rack the user will be called back If you require a specific dial out group to consist only of modems in a specific rack you
22. connector or when switching it on when connected the modem will be automatically configured to DTE 115K2 EO SO 1 The connection is made with a cable as described in 2 2 Communication with the rack 3 Communication with the rack This chapter describes how you as manager make a connection to the management system Once a communication program has been started up on the connected PC or when the connected modem becomes connected to another modem the following will appear on the screen Please login Enter your user name for new units TRON The following will then appear Enter your password Now enter your password for new units MMU You may make a maximum of three attempts before being logged off by a hardware DTR DSR dip see chapter 0 The password can also be changed see chapter 0 Once a correct login has been performed the yellow LED on the management unit will burn You will now see a screen displaying the main menu Displayed in the main menu you will see Selection 1 This indicates that you are logged into rack 1 If a number of menu options separated by dots is displayed then you are located in a submenu Communication between the Management Module and a PC is possible in two manners 1 Menu Mode The user view change the configuration of the rack by means of menu selections The software also permits switching through to other racks if other racks are coupled You can always return to
23. continue The number of the last written event is also placed into the database and kept updated It can be found under rack advanced last log entry The system clock is not stored during power off This restarts from 0 on power on As a result it is no longer possible to determine the actual time of any events logged before the MMU was switched off unless they were downloaded before switching off and immediately related to the actual time A time interruption in the logfile can always be recognised by the power on event The very first word in the logfile contains the logfile number This number is set to 0 when the memory is initialised and is always incremented by 1 following a logfile overflow With this number the indexes of the logfile words and the q bit all logfile words downloaded by the MMU are uniquely identifiable even if the file later overflows If the logfile overflows it is therefore possible that the event itself appears in index 8000 whilst its extension field can be found in index 2 The logfile number is however always contained in index 1 36 8 Software upgrade 7 3 Logfile definitions bit field meanings mmmmm modem mode R 2 X 5 SSSSS modem bps R 2 X 6 ddddddd modem disconnect R 2 X 7 eeee modem error correction R 2 X 8 FEDCBA9876543210 bit numbers 000 extension field 001 free for future use O1X
24. dem has a data connection the speed at which data communication is taking place e g 9600 24000 will be displayed here 7 Disconnect reason If the data connection is terminated the disconnection reason will be displayed here 8 Error correction If a modem has a data connection the type of error correction and data compression will be displayed here e g None MNP5 V42bis Communication with the rack 10 11 12 13 14 15 Quality This option displays the quality of the modem connection if established 1 0 8 good 2 9 16 reasonable 3 16 63 poor Signals Status of the modem handshake signals 0 dsr 1 cts 2 dcd 3 dtr 4 rts 5 undef 6 undef 7 carrier detected Bits O to 4 are active low These signals are refreshed every few seconds Reset The modem will be reset by turning the power supply off and back on FactoryReset The modem is reset and receives the Factory settings This has the same effect as turning on the modem with the Softkey held in nitialise The modem first receives a Factory reset and then the init strings defined in the group are sent to the modem Analyse serial data This submenu provides a choice between TXD or RXD data 1 TXD The data entering the modem via the 5232 port and also sent to the PC or terminal 2 RXD data sent by the modem via the RS232 port and also to the PC or terminal The Analyse function can be term
25. ead and write authority 45 MMU Data structure Appendix 4 MMU Data structure RECORD rack R 1 H RECORD racknumber INTEGER R 1 1 H advanced R 1 2 RECORD manager index INTEGER R 1 2 1 system clock LONGI NTEGER 4 1 2 2 last log entry INTEGER 1 2 3 screen refresh time INTEGER R 1 2 4 renumber racks FUNCTI ON 1 2 5 reset eerom strings FUNCTION R 1 2 6 clear logfile FUNCTION 1 2 7 debug info R 1 2 8 RECORD send traps ENUMERATE off on R 1 2 8 1 last trap number INTEGER R 1 2 8 2 upload new MMU software INTEGER R 1 2 8 3 upload new modem software INTEGER R 1 2 8 4 debug info on off INTEGER 1 R 1 2 8 5 debug info modem INTEGER R 1 2 8 6 task list FUNCTION R 1 2 8 7 watchdog timers FUNCTI ON R 1 2 8 8 test function FUNCTI ON 1 R 1 2 8 9 rack f busy R 1 2 9 RECORD rack f busy off FUNCTION 1 R 1 2 9 1 rack f busy on FUNCTION 1 R 1 2 9 2 rack f busy control off FUNCTION R 1 2 9 3 rack f busy control on FUNCTION R 1 2 9 4 software version CHARSTRING R 1 3 organisation name CHARSTRING R 1 4 manager name CHARSTRING R 1 5 telephone home CHARSTRI NG R 1 7 serial number CHARSTRING R 1 8 46 MMU Data structure modem ARRAY 16 R 2 RECORD modem group ENUMERATE R 2 X 1 group 1 group 2 group 3 group 4 group 5 group 6 group 7 group 8
26. er indicates that the MMU is connected to COM 1 COM 2 may also be used If the binary file MMXXX BIN is not located in the current directory the program will return an error message In that case a full path name can also be given in addition to the filename The program selects a port speed of 19200 BPS as standard 25 The program requests a name password combination to log in to the MMU This combination can also be entered on the command line for example upload 1 F nTRON pMMU MMXXX BIN for the MMU 9 pin front connector at 19200 BPS or upload 1 nTRON pMMU MMXXX BIN for the backplane 9 pin connector at 115200 BPS 3 The program will now provide all coupled racks with new software in succession the program ensures that the rack to which it is connected is upgraded last If for example 6 racks are present and the PC is connected to rack 4 the upgrade sequence would be 1 2 3 6 5 4 The operational status of the upgrade is reported continuously by the program If the program is unable to log into a rack check the connection with the aid of a terminal program Remember to log out following this check as the program searches for the login prompt from the MMU 8 4 Uploading MMU software remote It is also possible to upload MMU software remotely A modem should be connected to the MMU on the remote side as described in chapter O for this purpose In case the MMU contains a software version lower than v0 87 the modem
27. es many events in memory together with the time at which those events occurred As a result the following data is stored Connection Information about each connection made by each modem For each connection the following information is stored start time duration mode V standard speed error correction type and compression quality and reason for disconnection In case of auto dialback the user number is also stored Not installed Start time and duration of a modem s removal absence from the rack Power Rack switching on and switching off time Any failure of either power supply is also recorded This data is recorded as micro events and can only be viewed in compressed form using the menu option logfile This compression format is described further in the appendix When the logfile becomes full the oldest data present is overwritten The logfile is intended to be large enough to record all the events occurring within one day This is of course dependent on the intensity with which the system is used 33 8 Software upgrade 7 1 logfile format The logfile in the MMU currently consists of a compact list of 8000 16 bit words 400 words in older MMU s Each event consists of 1 word plus 1 or more eventual extension fields Each extension field should be considered as a data field for the previous event The significance of an event can generally be read from the four highest bits 0000xxxxxxxxxxxx extension f
28. g QSNMP Traps to the SNMP Proxy agent of the MMU last trap number Sequence number of the last trap sent upload new MMU software See Chapter 0 upload new modem software See Chapter 0 debug info on off Only used by the manufacturer debug info modem Only used by the manufacturer task list Only used by the manufacturer watchdog timers Only used by the manufacturer 5 test function Only used by the manufacturer rack f busy 1 rack f busy off Switch off forced busy at all modem slots 2 rack f busy on Switch on forced busy at all modem slots 3 rack f busy control off Disable the use of the forced busy of all modem slots This function is only used by the manufacturer 4 rack f busy control on Enable the use of the forced busy of all modem slots This is default behaviour WONAUAW Software version This field indicates which software version is contained in the MMU Organisation name Communication with the rack The text entered into this field appears automatically above every menu screen 5 Manager name This field is only used to record information and can be filled in as required It has no effect on modem functions or MMU functions 6 Telephone work This field is only used to record information and can be filled in as required It has no effect on modem functions or MMU functions 7 Telephone home This field is only used to record information and can be filled in as required It has
29. hat another response follows For example command 02T71 2 3 3 response 0O02 Eoff 02 the enumerated strings for Power 29 5 MMU Commands 5 4 GET command The Get command can be applied to all types with exception to Records Arrays and Functions The command string consists of a Message number the letter G and a path to the data element The response again contains the Message number the Type and the content of the data element The latter value may be an integer long integer or string For Log File and Password types this value is coded and cannot be used under normal circumstances For Enumerated types this is the Index to the currently selected field The accompanying string is stored in the structure Example command 04G1 1 5 response O4CTron organisation name Tron command 05G1 2 3 3 response 05 1 from modem 3 power on command 0661 6 3000 1 response 06H65535 logfile entry 3000 65535 5 5 SET command The Set command can be used on all types with exception to Records and Arrays The command string contains a Message number an S a path and character followed by the new value for the data element This value is an integer long integer or string depending on the element type Data types The response consists of the Message number and the letter O from OK For example command 0751 1 7 053 123456 telephone home 053 123456 response 070
30. hed on and the MMU is present If the rack power supply is switched on the modems will not be initialised that case the modems will retain the settings of the previous configuration A condition for this is that the last init string ends with the amp W command store the configuration in the modem itself 3 12 Initstring 13 14 15 16 These strings contain the AT command strings sent to the modems from the group See Auto Config and Initialise Auto line busy If this option is on the line for each modem in the group will be disabled if the modem is absent or if the power supply for that modem fails Default is on ADB Delay Time between dialling in and dialling out in seconds This value should never be less than 20 seconds Default 45 Sec I nitialise Function that sends the init strings to all modems in this group Upload new software This initiates the upload of new modem software After selecting this option the MMU expects an ASCII upload of a software file in Motorola hex format with which all the modems in the group will then be programmed Ensure that the file to be sent is the correct one as an erroneous upload cannot be reversed If the group is being used as a dial out group for auto dial back then the setting for this group should basically be the same in every rack See the chapter concerning auto dial back Communication with the rack 3 6 Manager menu The manager menu i
31. ield 0001xxxxxxxxxxxx extension field 001 free for future use 01 free for future use 1000mmmmqddddddd disconnect reason 1001mmmmpgqttttttt modem specific events 1010mmmmattttttt modem went online 1011mmmmattttttt modem went offline 1100mmmmwqgsssrrrr ADB request 1101mmmmasssrrrr_ ADB dial out 1110eeeeqttttttt rack specific events 1111722222222222 clock event The letters indicate what other information the events contain event type disconnect reason modem number indication bit for current end start of the log file rack number time stamp status don t care bit 7 to 18 of the 32 bit system time complete definition of logfile data is provided in chapter 7 3 34 8 Software upgrade 7 2 Time registration Events occur in a time sequence and the MMU also stores them as such in the list A number of events are provided with a time stamp bit O to 6 Only events that by definition are not preceded by an event with a time stamp do not receive a time stamp The event time of these events is then derived from the accompanying preceding event Example 475 1011 0010 40000101 modem 0010 went offline at 0000101 Sec 476 1110 eeee q0000110 rack specific event at 0000110 Sec 477 1011 0111 40001001 modem 0111 went offline at 0001001 Sec 478 1000 0010 q0001001 disconnect reason no protocol in common At time 0000101 event 475
32. inated by pressing lt 5 gt DirectConnect The PC or terminal is now connected to the modem This will enable you to examine and change the modem settings and enter random commands It is also possible to make a connection using the modem The function can be terminated by typing 969696 Communication with the rack The AnalyseTxd AnalyseRxd and DirectConnect commands use the speed to the modem that has been set in the group This may be different to the speed to the PC or terminal Flowcontrol between the modem and MMU for these functions has not yet been implemented The MMU can only communicate with one modem at a time When using the AnalyseTxd AnalyseRxd en DirectConnect functions all modem monitoring operating functions will be temporarily disabled For example If you were configuring modem 3 with the DirectConnect function and a modem was changed at position 7 the MMU would not detect that change Modem 7 would then not be configured automatically Communication with the rack 3 5 Group menu In this menu the following options can be set for each group 1 Speed DTE speed of these modems 300 115200 BPS This speed is used when transmitting the init strings and for the AnalyseTxd AnalyseRxd and DirectConnect functions in the modem menu Default 19200 Auto Config If this is on default a modem will be configured automatically with the init strings when inserted into the rack if the power supply is switc
33. k Management Protocol a component of the Internet standard Network Management Framework This protocol formed the basis for the design of several simple commands that enable the Management Module to exchange data with the PC As these commands do not correspond exactly to the SNMP protocol we refer here to MMU commands The same data can be managed in the MMU Command Mode as in the Menu Mode There are three MMU commands e Type This is used to request the data structure Get This is used to request the content of a data element Set This is used to modify the content of a data element The MMU commands and responses are transmitted over the serial connection between the PC and the Management Module as strings the commands are not echoed With the aid of these commands a PC application can manage and upload and download the data in the racks Each command that is transmitted receives a response To increase communication speed the MMU can receive multiple commands in a single burst It is not necessary to wait for the responses before a new command is transmitted The only exceptions to this are the previous rack next rack and logout commands A 1 character ASCII 123 is used to switch the module from the Menu Mode into the MMU Command Mode This character must usually be preceded by a CR to terminate an unfinished menu command Switching back to the Menu Mode is achieved by transmitting a character AS
34. lected the default name password combination will be used It is also possible that another manager may already be logged in to this rack In that case it will not be possible to switch through to this rack Next rack The same as Previous rack but now the following rack via the female D 9 connector on the rear panel of the MMU Logout The logout command is used to terminate a session You will also be logged out if the terminal DTR signal or the modem carrier detect signal is dropped Communication with the rack 3 3 Rack menu This submenu offers the following options 1 Rack number This field indicates the rack number and cannot be modified 2 Advanced This calls up a submenu E 2 3 4 9 manager index Indicates the number of the manager logged in system clock ndicates the time elapsed since the MMU was started in seconds last log entry Indicates which entry in the log was written last screen refresh time By setting this to a value greater than O the modem menu is refreshed if the status of one of the modems changes The value entered is the minimum number of seconds between two refreshes e g 5 seconds renumber racks This function can be activated if the rack numbering is no longer correct e g after changing a management system reset eerom strings This function erases all data from the ADB list clear logfile Only used by the manufacturer debug info F send traps Switch on off sendin
35. modem 0010 went offline A few events later 478 a disconnect reason was received for 0010 as a direct result of the offline report 475 The disconnect reason does not therefore have to contain a time stamp because 475 and 478 are related The system clock is a 32 bit second counter that starts running from 0 on power on The time stamp in the non clock events together with the clock event indicates the status of the system clock as it was at the moment the event took place Using the time stamps and the clock events it is left to the logfile reader to reproduce the system clock and allocate the events The 13 y bits 12 z bits and 7 t bits 32 bits in total must be placed together in the sequence yyyyyyyyyyyyyZzzzzzzzzzzzzttttttt The t bits are found in the time stamp for non clock events the z bits in the clock event itself and the y bits in the extension field of the clock event In principle a clock event is only placed in the logfile when the z bits have changed and furthermore in order to save space only when it is really essential When the second of two successive events has a time stamp the t bits with a lower time value than the first the t part of the system has evidently overflowed and the carry must obviously be transferred to the z bits In such a case no clock event appears in the logfile and the logfile reader will have to add the z part himself The system clock produced in this manner can then carry on without
36. n a maximum of 16 modems A maximum of 15 racks can be coupled Each MMU can store 2000 auto dialback names PCB MMU 2295 Older MMU s PCB MMU 3994 can store a maximum of 1000 ADB names Each MMU can store 8000 micro events in a logfile PCB MMU 2295 Older MMU s PCB MMU 3994 can store a maximum of 4000 micro events Dimensions The MultiTRON 19 rack system is 19 wide and 4 units high Operational reliability Various safeguards have been included in the rack system to increase operational reliability On the absence or non functioning of the MMU the modems continue to function as normal Each modem has its own stabilised power supply The power supply transformer possesses two secondary windings each supply power to 8 modems via two rectifiers If a winding or rectifier should ever fail half of the modems will continue to function normally The MMU is powered by both transformer windings and will remain operational providing only one of the two power supplies has failed The processors in the modems and the MMU are monitored by a watchdog system which will reset the processor concerned if any abnormal program results are detected Fuses Two fuses 10 A slow are located on the rear of the backplane Fuse 1 is for the transformer winding that supplies power to modems 1 to 8 Fuse 2 is for the winding powering modems 9 to 16 A primary 1 A fuse is incorporated in the mains input Power consumption
37. ng at modem 1 associated with the right part of the first word modem not present no initiated received from modem no flash code received from modem upload error no programmed received from modem upload OK modem skipped 02005 UNO clock event extension 000y yyyy yyyy yyyy 38 8 Software upgrade 8 Software upgrade Both the MMU and the rack modems can be provided with new firmware by means of an upload providing the hardware meets the following conditions To upgrade the MMU the condition is that the MMU software is contained in a flash rom and not in an eprom The conditions for upgrading the rack modems are 1 The software in the de modem in contained in a flash rom and not an eprom 2 The MMU possesses a flash eprom specially intended for this purpose a flash rom other than that accommodating the MMU software Consult your supplier to find out if your hardware meets these conditions The upload procedure for the management unit and for the rack modems are different and are therefore discussed separately 8 1 Uploading modem software local Uploading new modem software can be performed per rack and per group To upload to all modems in the rack the command upload new modem software can be found in the menu rack advanced debug info menu option 4 To upgrade the software to a modem group a second upload command is included in the menu group upl
38. no effect on modem functions or MMU functions 8 Serial number 9 This is the PCB serial number and can only be filled in by the manufacturer Communication with the rack 3 4 Modem menu If modem is selected in the main menu an overview of the modems present and their status is displayed Each modem can be addressed individually by entering the number of the required modem 1 16 This number is not coupled to an individual modem but to the position occupied by the modem in the rack Once a modem has been selected you can choose from the following options 1 Group Here you can set the group to which the modem belongs see paragraph 3 5 If you change this setting the modem will immediately be configured with the init strings belonging to the group selected 2 State This indicates which state the modem is in 1 Not installed No modem present 2 Available Modem present 3 Online Modem online 4 Reserved This modem is reserved to call back a user during the elapse of time of the ADB delay 3 Power This can be used to turn the modem power supply on or off 4 F Busy If this is option is switched on the line for this modem will be disabled The modem can then no longer be used normally Forced Busy can be used to disable a line if a fault is occurring in the modem or on the line 5 Mode If a modem has a data connection the data communication standard e g V32bis V34 will be displayed here 6 BPS If a mo
39. nsion code identifies the ADB user who requested the dial back Status 0 successful ADB 37 8 Software upgrade another 1110eeeegttttttt l1111lzzzzzzzzzzzz UT ds ana modem didn t go online Retry follows modem didn t go online Go to another modem modem went offline too quickly Retry follows modem went offline too quickly Quit modem went offline too quickly and was reserved by another process immediately Go to another modem modem went offline too quickly due to no dial tone Go to modem rack specific events e event type event type 0 E a power event The extension code can be rack power on mmu plugged in watchdog fired interrupt level O failed watchdog fired interrupt level 1 failed watchdog fired base context failed an unimplemented opcode was executed rack power down unused power 1 failure modem 1 8 power 2 failure modem 9 16 10 power 1 back 11 power 2 back 12 link to previous rack broken 13 link to next rack broken 14 link to previous rack restored 15 link to next rack restored manager logged in The extension code contains the manager index manager logged out No extension code supplied racknumber change The First extension code is the old rack number and the second the new Manager tried to login three times unsuccessfully modem software uploaded The eight extension codes following indicate the upload result for each modem starti
40. oad new software menu option 16 If only one modem is to be upgraded it will be necessary to temporarily assign that modem as the only modem in a group and then perform the upgrade via that group Uploading the modem software is performed as follows Use Telix or simulair software to upload modem Loader and modem Image Use RS232 port at the backside of the rack front is very slow and login Telix settings 115k2 8N1 XON XOFF handshake ON important CTS RTS handshake OFF DSR DTR handshake OFF Uploads can be individual by group or by whole rack 1 Individual enter in menu 2 modem select desired modem 1 16 16 upload software 2 Group 3 group select desired group 1 10 16 upload new software 3 Rack 1 rack 2 advanced 8 debug info 4 upload new modem software 39 8 Software upgrade MMU starts wiping flash After a few seconds it asks for the modem Loader attached in Ldr371mm zip Note The Loader is a special version for rack updates Use page up key to initiate the upload select ASCII transfer Select file press F10 to upload file After the loader the MMU asks for the modem Image this is a normal unmodified image Again page up ASCII transfer select modem Image F10 The Loader and Image are checked while uploading MMU will report detected errors in both files When no errors are detected MMU will start programming the modem s Upgrading the whole rack 1
41. owest D9 connector on a rack has to be connected with the uppermost D9 connector on the rack below it On installation the racks are then automatically numbered from the top 1 to the bottom n The rack number appears on the 7 segment display of the management unit and is also stored in the management unit itself From rack number 10 the display is numbered using a letter A for 10 etc Rack numbering increments automatically but does not decrement back This means that if a unit is removed from the chain all the others units will retain their own number If the management unit that was removed is replaced it must therefore be replaced in the same position in the chain Installing the MMU 2 3 Connecting a PC or terminal A PC or terminal can be connected to the D9 connector on the front of the management unit The PC or terminal must be configured to 19200 BPS 8 databits 1 stopbit The PC can also be connected to the uppermost D9 connector on the rear of the management unit In that case the PC has be configured to 115200 BPS If multiple racks are coupled the PC must be connected to the uppermost rack The connection is made with a cable as described in O 2 4 Connecting a modem The management unit can also be operated via a modem The modem must then be connect to the lowest D9 connector on the rear of the management unit If multiple racks are connected the modem must be connected to the lowest rack After being connected to this
42. s a list of persons authorised to login to the MMU Everyone logging in as a manager has a specific user class The following user classes are available 1 Supervisor The supervisor can do everything the manager can the supervisor can also enter new managers and modify manager data Manager In principle the manager can do everything described in this user manual A manager is however unable to modify data in the auto dialback list and the manager table ADB Editor The ADB editor can only modify the auto dialback list The ADB editor can therefore enter new users but has no access to modem and group menus Technician The technician can modify the modem and group menus but only read not modify the auto dialback list Data that is not visible to a manager is referred to as being protected Passwords are always protected and can therefore never be viewed The data in the rack submenu be viewed by everyone but only entered by a manager and supervisor 20 5 MMU Commands 4 Auto dialback The auto dialback system serves as a security measure for a public dial in point It is based on calling back system users using a telephone number retrieved from a system user list If a hacker possesses a valid name password access to the system will still be denied because the system will attempt to call back on the telephone number of the genuine user The auto dialback system functions as follows A user dials in
43. s that this is not the last response in this message no The MMU Response This response consists of one letter Failure possible for all commands response to SET command R Record A Array response to TYPE command The following responses may appear for the TYPE and GET commands D Function C Character String Integer L Long Integer Log File Integer P Password Dataclass consists of one letter that indicates the class of the element for records only This contains the requested value of a data element The value can be of the type integer long integer or string On Failure this field contains an error number and a description of the error In some cases Extra contains supplemental information following an error message E g for error message no 27 the current rack number is given 43 Appendix 2 Error messages The following errors may occur in the MMU command mode Error4 Not a valid integer The integer value given does not fall within its defined limits Error6 Not a valid long The long integer value given does not fall within its defined limits Error7 Undefined command The command character given is not defined Error8 Undefined path The path entered does not point to a valid element in the structure Error9 Undefined data No data has been entered with the Set command Errorll You have no right to read this data User authority is in
44. setting only becomes active following a modem rest The Z command is used for this purpose The dial in option is turned off with S80 1 Z Of course the modem must also be set to auto answer SO 1 If nothing is connected to the RS232 port on the dial in modem DTR should be disabled with amp DO The text that the modem sends to the user has to be programmed into the modem for example string 1 Welcome to enter your name string 2 Enter your password string 3 Identification correct you will be called back string 4 Identification incorrect string 5 Maximum identification time elapsed string 6 system is busy If the modem is set up as a dial in modem once the user has entered a username and password an interrupt is sent is to the management system The management system then takes the name password combination from the modem and uses it as the reference for the search in the auto dialback list or in multiple racks lists Following that one of the following strings will be sent back If the user cannot be found string 4 is sent If the user is found and a modem in the dial out group is available string 3 is sent If no modem is available string 6 is sent If the user fails to enter a name or password within the allocated time string 5 is sent If the management system is not present or for any other reason fails to send a message back to the modem within a specific time a SYST
45. stored in a Password variable 28 5 MMU Commands 5 3 TYPE command The type can be called up for all elements in the structure The command string consists of a Message Number a T and the path to the element The response contains a copy of the Message number followed by a letter that indicates the Type of the element Record Multiple responses can follow the command for the type Record Each response contains one string from a string table Furthermore the responses also contain a Dataclass letter There are separate read and write authorities associated to each Dataclass see appendix for an overview of Dataclasses An asterisk indicates that another response is following so only the last response does not contain an asterisk For example command 03 1 1 response 03 RKrack number 03 RArenumber racks 03 RAreset eerom strings 03 RJ software version 03 RAorganisation name 03 RAmanager name 03 RAtelephone work O3RAtelephone home the record fields of rack Array If the element is of the Array type then a number follows in the string that indicates the length of this array For example command 01 1 2 response 01 16 The modem array contains 16 elements Enumerated In the Enumerated type multiple responses can also follow the command Each response again contains one string from a string table but now indicates a value instead of a submenu An asterisk is also used to indicate t
46. sufficient to read the entered element Error12 You have no right to change this data User authority is insufficient to modify the entered element Error15 not possible A Get has been entered for a structure element R or A instead of a Data element Error18 not possible A Set has been entered for a structure element R or A instead of a Data element Error25 STRUCTURE NOT CORRECT The structure or data composition in the Management Module is not correct The Extra field contains an integer value that indicates the location of the error in the software Error26 Not a word value The hexadecimal value entered falls outside its defined limits Error27 Racknumber is not current rack The rack number in the path entered does not correspond with the current rack number The Extra field contains an integer value that indicates the current rack number 28 MANAGEMENT MODULE IS OUT OF MEMORY There is no more space in Management Module memory to store the entered string 44 User and Dataclasses Appendix 3 User and Dataclasses Dataclass Userdass 0 m editor ian Rack data R R Modem data 1 Modem data 2 Group data Management data Management data ADB data 1 ADB data 2 Log data ROM data Read Only data Write Only data Common data A B D E 1 F 2 G H J K L M No authority R Read authority W Write authority R W R
47. tallation or removal of modems Rack coupling Racks can be coupled via the MMU This permits a maximum of 15 MMU s to be controlled from a single connection Operation The MMU can be coupled to a terminal or a PC via an RS232 connection and also via a modem connection The system can be operated from the PC using a standard terminal program Test functions asynchronous only The RS232 port on the PC can be switched through to a specific modem in order to give this modem direct commands or to make a connection Installing the MMU 2 Installing the MMU The modem management unit is installed in the right hand side of the rack Units bearing production code MM3994 or higher may be installed in the rack whilst the rack power supply remains on The red error LED on the management unit will then burn briefly During start up the yellow busy LED will burn and once the MMU is ready only the green OK LED will continue burning 2 1 Installing modems A modem can be installed in the rack whilst the power supply is switched on If the management unit is present the power to the modem will only be switched on after it has been in the rack for approximately one second 2 2 Coupling racks It is also possible to stack multiple racks above one another in a 19 unit This enables multiple racks to be addressed via one connection A standard male to female cable is used to couple the racks one of which is supplied with each rack The l
48. will not be set automatically and this will have to be performed manually The local modem speed should not be set too high 19200 BPS recommended The upload is now performed as follows 1 Dial out of your terminal program to the MMU and ensure that you receive an login prompt from the MMU do not login 2 Close your terminal program without disconnecting or go to a DOS shell Proceed further with step 1 in chapter O If the upload program is unable to find the binary file the connection will be terminated so particular attention should be given to spelling 41 MMU Commands Appendix 1 MMU Commands MMU string send NR Command Path Int Value CR NR A random Message Number This number consists of two numbersand is sent back with the accompanying response Command The MMU Command The command is one upper or lower case letter T or t TYPE or g GET and S or s SET Path A Path to the data element The path consists of a maximum of 20 integers separated by dots Int Integer 1 1 indicates to the password that the value field contains an Integer used for passwords only Value In a Set command this contains the new value for the Data element The value can be of the type integer long integer or string MMU string receive NR Answer Class Value Extra CR NR Response Class Value Extra The Message Number to which this response belongs An asterisk mean

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