µTMS USB BUFFER
Contents
1. SS telecoms our solutions your success uTMS USB BUFFER tle MIT USER MANUAL TMS USB BUFFER USER MANUAL Revision history Revision 01 New document 2009 06 30 CONTENTS 1 3335 530 7 eee eed EBATURES occa ies rede Us eed EE E NE ae 3 DESCRIPTION 5 33 7 3777 4 CONNEGTION 0 7 7 7 3 1 11131 4 0 DRIVER INSTALLATION ava 3 3333 1 3113311 6 CHANGING THE COM PORT 2200 7 2 22 8 TECHNICAL 1 05 5 5 9 CONTA OT DETA 133 APPENDIX A USING UTMS AS A 6 DOC NO SST uTMS USB 14 REV 01 Page 2 of 9 HTMS USB BUFFER USER MANUAL 1 INTRODUCTION The microTMS buffer is a POWER small call record buffer ADAPTOR fit2. Mstat0000800000000101 means that buffer has 32k ram fitted and there are 257 bytes of data in the buffer is the hex value of the memory installed DOC NO SST uTMS USB 14 REV 01 Page 5 of 9 TMS USB BUFFER USER MANUAL TECHNICAL SPECIFICATIONS LED indicators Diagnostics PC Tx amp Rx 80 buffer full PABX DATA Watch Dog Timer Connectors PC Connection USB PABX Connection 9 way D type male Current Firmware Rev 1 08 Version Storage medium Non volatile Storage capacity 32K or 64K Setup storage Non volatile set up data storage Compatibility Compatible with most PABX units Required voltage Voltage supplied by PABX PC PABX baud rate Software settable Bd 300 600 1200 2400 4800 9600 PC baud rate Software settable Bd 300 600 1200 2400 4800 9600 Data storage Time stamping of call records and events Data compression typical ratio 2 5 1 Warning beeper at 95 full DTR enabled dumping of records ASCII handshake protocol Fully error corrected proprietary protocol DOC NO SST uTMS USB 14 REV 01 Page 6 of 9 TMS USB BUFFER USER MANUAL telecoms our solutions your success 9 CONTACT DETAILS Office 23 Botha Avenue Lyttelton Manor Pretoria Gauteng South Africa Tel 27 12 664 4644 Fax 27 86 614 5625 E mail info sstelecoms com Postal address Postnet Suite 48 Private Bag x 1015 Lyttelto
3. allowing this vendor a much cheaper entry to this customer than the original vendor Solution to issues The basic solution to the problems outlined above has already needed addressing in the GSM arena Authentication of users is vital to ensure that billing is accurate for example How do they do this It is done using a system known as Challenge Response authentication This will be outlined briefly below Challenge Response Description The PC software and the Buffer have both loaded with a secret key This key can be up to 16 characters The PC sends the buffer a challenge consisting of a short randomly generated message of up to 10 characters The Buffer performs a hashing function on this message using the secret key as part of the process It is not possible using a small number of messages to determine what the key is The buffer then sends the result of the hashing function to the PC The PC then compares this to the result of internally generating the hash result If the results match then the buffer is authenticated and the software will run IMPLEMENTATION Setting the key Use the command nnkk lt enter gt where is the tilde character followed by a space character and then the 2 digit hexadecimal offset nn for the key character which is also sent hexadecimal kk and lt enter gt is the Carriage Return character OxOD The sequence to set the secret code to TEST is shown below 0054 0145 0
4. 253 0354 The process has been automated and the code can be set and tested using the Buffer Lock tool Challenging the buffer The command to challenge the buffer is CODErrr rrr lt enter gt where CODE is the command rrr rrr is the random challenge string up to 10 characters in length and lt enter gt is the Carriage Return character OxOD DOC NO SST uTMS USB 14 REV 01 Page 8 of 9 TMS USB BUFFER USER MANUAL Buffer response The buffer will respond with the following CODE hhhh lt enter gt Where CODE is the response text and is a 16 bit CRC for the submitted challenge and the secret key Response validation In the code below the variable CRC is a 16 bit unsigned integer and char is 8 bit CmdBuf is the input buffer where the string starting with CODE is stored and CmdPtr indexes the 1st h void CalcCrc unsigned char ser_data cre unsigned char cre gt gt 8 cre lt lt 8 Cre ser_data cre unsigned char cre amp Oxff gt gt 4 Gre ere lt lt 8 lt lt 4 cre crc amp Oxff lt lt 4 lt lt 1 crc amp OXxFFFF void mfCode void char p amp CmdBuf CmdPtr int retCrc HexToInt p 4 convert the hex data to int OxFFFF initialise the crc do the calculation on the challenge unsigned int i 0 i lt strlen test i CalcCre test i do the calculation on the UserKey int i 0 i lt strlen Se
5. cretKey i CalcCre SecretKry i cre should be equal to retCre if all is well DOC NO SST uTMS USB 14 REV 01 Page 9 of 9
6. n 0140 Pretoria Gauteng South Africa Sales Support South Africa E mail sales sstelecoms com United Kingdom E mail uksales sstelecoms com Technical Support E mail support sstelecoms com DOC NO SST uTMS USB 14 REV 01 Page 7 of 9 HTMS USB BUFFER USER MANUAL APPENDIX A USING TMS AS A SECURITY DONGLE INTRODUCTION With the proliferation of software solutions it is becoming commonplace for software to be pirated or used without authorisation A fairly standard solution is to provide a dongle hardware device that attaches to the PC and the software will not run if the device is not present This obvious lock is often a source of irritation to the end user A more elegant solution is to provide a useful device that acts as the security dongle The data buffer is an obvious candidate for the task where a Telephone Management System is the application SS Telecoms have developed a simple protocol that will allow software to verify that it is attached to a matching buffer DISCUSSION ON SECURITY ISSUES There is a simple level of security provided by having a data buffer in the first place Pitfalls can be identified such as Another hardware manufacturer can develop a buffer with a similar protocol This means that it will be possible to hijack the software package by using these alternate buffers Another software vendor can adapt his software to work with the buffers and thus take over the installed base of buffers
7. ted between the PABX OPTIONAL and PC The buffer ispowered from the PC and or PABX lines A power supply is optional and can be used 0 9 if the PABX PC does not supply adequate voltage PC USB 2 FEATURES 32K or 64K versions Powered by PABX and or PC Power adaptor is optional USB PC Port Non volatile data buffering _ LED status indicators for diagnostics DB 9 male female connectors for PABX PC connection Easy installation Beeper for memory read status and buffer 95 full warning 3 DESCRIPTION DN FT PABX connector DBI male Yellow LED date receive from PABX gt Red LED Data transmission to PC Yellow LED Data receive from mp PC Red LED Buffer 80 full i Input for optional power supply PC connector USB DOC NO SST uTMS USB 14 REV 01 Page 3 of 9 HTMS USB BUFFER USER MANUAL 4 CONNECTION PABX Connection Pin Pin Description 2 Receive from PABX 7 amp 4 Handshake to PABX 5 Common Ground signal 6 amp 8 Handshake from PABX 5 DRIVER INSTALLATION Follow the steps below on installing the USB High Speed Serial Converter for the first time 1 Plug in the USB cable into the USB port and Windows will detect the new hardware SS Peripheral Run the Add New Hardware Wizard to assist you in setting up the new Device 2 Insert the USB High Speed Serial Converter driver diskette in
8. ter gt Request a record in ASCII DUMP lt enter gt Dump all stored data SB baudrate lt enter gt Set PABX baud rate SP baudrate lt enter gt Set PC baud rate Note The new settings will be operational after the buffer is reset UC lt n gt Converts lowercase to uppercase 1 enabled 0 disabled LF lt n gt Stores multiple line feeds 1 enabled 0 disabled SD n lt enter gt 1 enable Date Time insertion 0 disable Date Time insertion YY n lt enter gt Store Year ifn 1 YC n lt enter gt Store Century if n 1 TIME YYMMDDhhmm lt enter gt Sets the Time Note This command has no purpose and is only included for back wards compatibility SAD n lt enter gt 1 Enable AutoDump 0 Disable AutoDump SAT nn lt enter gt Set AutoDump timer to nn 50 milliseconds CLEAR lt enter gt Clear the memory and reset SYS lt enter gt Display system information BEEP n lt enter gt 0 Beeper Off 1 Beeper On Hl lt enter gt Output Product Info Maximum Memory Capacity Used Memory and number of lines used VER lt enter gt Display Software Version number MM Displays buffer capacity and used memory Response is MstatccSSSSSSccUUUUUU lt cr gt lt lf gt Where CC is used internally and have no useful meaning SSSSSS the amount of memory used e g
9. to the floppy drive and click Next to continue Select Search for the best driver for your device and click Next b Select Specify a location and click Browse Change the folder of your floppy drive e g A and click OK 0 Double check the directory that Windows prompts Click Next d Windows will detect the driver FTDIBUS inf and show the USB High Speed Serial Converter Click NEXT to continue until installation is complete e Click NEXT to continue and let Windows copy the needed files to your hard disk Follow further instructions for installing the USB serial port g Click Finish when installation is complete f After installing the System will generate an additional COM Port USB to Serial Port e g COM3 for the connection to RS232 Serial Device 6 CHANGING THE COM PORT NUMBER 1 It is possible to change the COM port number for the USB serial port a From DeviceManager select View devices by type then Ports COM amp LPT b Select the USB serial port and click Properties 0 Select the Port Settings tab then click Advanced Choose the required COM port number from the list and click OK DOC NO SST uTMS USB 14 REV 01 Page 4 of 9 TMS USB BUFFER USER MANUAL PROGRAMMING COMMANDS INSTRUCTION DESCRIPTION STX lt hh gt Where hh is a 2 digit hex number ETX lt hh gt When set to FF the STX and ETX behavior is turned off and normal lt CR gt line termination is accepted S lt en
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