User Manual - IRT Communications
Contents
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9. 17 10 2007 SNMP What Is It SNMP stands for Simple Network Management Protocol It is an application layer protocol for managing IP Internet Protocol based systems SNMP enables system administrators to manage system performance and to find and solve system problems SNMP runs over UDP User Datagram Protocol which in turn runs over IP Three types of SNMP exist SNMP version 1 SNMPv1 SNMP version 2 SNMPv2 and SNMP version 3 SNMPv3 It is not the intention here to discuss the differences between various versions only to bring attention to the fact that IRT Electronics modules fitted with SNMP capability use SNMPv1 An SNMP managed network consists of three key components Network Management Systems NMS agents and managed devices An NMS is the console through which the network administrator performs network management functions such as monitoring status e g alarm states and remote controlling of a set of managed devices One or more NMSs must exist on any managed network Generally the NMS is a computer running third party SNMP control software There are a number of third party SNMP software applications currently available on the market An NMS polls or communicates with an agent An agent is a network management software module that resides in a managed device An agent has local knowledge of management information and translates that information into a form compatible with SNMP The agent therefore acts as an i
10. R T Electronics Pty Ltd A B N 35 000 832 575 26 Hotham Parade ARTARMON N S W 2064 AUSTRALIA National Phone 02 94393744 Fax 02 9439 7439 International 61 2 9439 3744 61 2 9439 7439 Email sales irtelectronics com Web www irtelectronics com IRT Eurocard Types MMM 4230 amp MMX 4230 4 Channel ASI to G 703 Multiplexer De Multiplexer Designed and manufactured in Australia IRT can be found on the Internet at http www irtelectronics com 4230 mmm amp 4230 mmx ib rev4 doc Page 1 of 17 17 10 2007 IRT Eurocard Types MMM 4230 amp MMX 4230 4 Channel ASI to G 703 Multiplexer De Multiplexer Instruction Book Table of Contents Section Page Operational Safety 2 General Description 3 Technical Specifications 4 Configuration 5 Link settings 5 Switch settings 6 45 Mb version 6 Variable Bandwidth Channel Allocation Selection A 7 34 Mb version 8 Installation 9 SMU 4000 Installation 10 Figure 1 SMU 4000 module 10 RS 422 pin assignments 11 The RS 422 standard 12 Front and rear layouts 13 SNMP What Is It 14 Maintenance amp Storage 16 Warranty amp Service 16 Equipment return 16 Drawing List Index 17 This instruction book applies to units later than S N 0504001 Operational Safety WARNING Operation of electronic equipment involves the use of voltages and currents that may be dangerous to human life Note that under certain conditions dangerous potentials may exist in some circuits when pow
11. The RS 422 standard introduced in the early 1970s defines a balanced or differential data communications interface using two separate wires for each signal Due to the high noise immunity of the RS 422 standard high data speeds and long distances can be achieved The RS 422 specification allows reliable serial data communications for e Distances up to 1200 metres e Data rates of up to 10 Mb s Only one line driver is allowed on a line and up to ten line receivers can be driven by it Figure 1 1 illustrates RS 422 RS 422 RS 422 Transmitter Recei SS Se Balanced Line with a ond ACE Line Driver Differential Voltages Line Receiver 5V to 45V RS 422 Receivers up to 10 devices Figure 1 1 RS 422 Connection Ref IDC Engineers Pocket Guide 4230 mmm amp 4230 mmx ib rev4 doc Page 12 of 17 17 10 2007 Front amp rear panel connector diagrams The following front panel and rear assembly drawings are not to scale and are intended to show connection order and approximate layout only 4230 ASI 1 512 513 ASI 4 DATA ALARM 4230 mmm amp 4230 mmx ib rev4 doc INPUT 1 INPUT 3 G 703 OUT RS 422 O IRT URGENT ALARM z INPUT 2 INPUT 4 4230 Em T ASI 10 512 513 ASI 4 DATA ALARM Page 13 of 17 O IRT URGENT ALARM OUTPUT 1 OUTPUT 2 OUTPUT 3 9 703 IN RS 422
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13. Engine SNMP Agent NMP A Protocol Engine gt gent 4230 mmm amp 4230 mmx ib rev4 doc Page 14 of 17 17 10 2007 SNMP with IRT Products IRT Electronics currently employs 5 1 with its 4000 series frame The frame acts as an agent when fitted with a CDM 4000 module This module has its own designated slot next to the power supply so as to not affect the number of modules that the frame will take Communication between the NMS the frame and its loaded modules are via this CDM 4000 module Note that the NMS software is third party and not supplied by IRT Electronics Ethernet connection for SNMP operation is via an RJ45 connector on the rear of the frame below the mains inlet Ethernet rate runs at either 10 baseT or 100 baseT Frame parameters such as Name Address and Location are set via an RS232 interface a D9 connector on the rear of the frame below the mains inlet A software terminal emulator such as Tera Term or HyperTerminal is used for setting and reading the parameters of the frame IRT modules that are SNMP compatible need a plug in SMU 4000 module with a program relevant to the module that it is plugged into Depending on the module besides the module identification parameters such as alarm states inputs and controls etc are communicated to the CDM 4000 agent via a data bus on the rear of the frame Thus the CDM 4000 collects information on what is loaded within the frame what positions they occupy and their curr
14. INFORMATION LK1 IN Allows instantaneous changes in channel bandwidth allocation as required by the Variable Data Assignment OUT Error concealment is applied to the packet distribution LK2 IN Output packet size is always 204 byte and will contain Reed Solomon code regardless of corresponding MMM 4230 input packet size OUT Output packet size matches that of corresponding MMM 4230 input packet size LK3 IN Outputs can be individually disabled by SNMP remote control Note that this requires SNMP functionality within IRT s SNMP frame OUT outputs are always enabled SNMP functionality not required LK4 IN For input G 703 signal that is framed OUT For input G 703 signal that is not framed LK5 IN Input G 703 equaliser not enabled OUT Input G 703 equaliser enabled 1 10 Installing this link will terminate the RS 422 data line Note Not applicable for 34 Mb s E3 version 4230 mmm amp 4230 mmx ib rev4 doc Page 5 of 17 17 10 2007 Switch settings 4230 45Mb version The MMM 4230 Multiplexer works in a channel protection mode The necessity for protection arises if the data rate of the inputs exceeds the maximum allowable for an MMM 4230 Transmitter 43 5Mb s Without protection all used channels would suffer errors With protection the available data rate can be divided among the input channels and if a channel tries to exceed its allocation only that channel is adversely affected A switch SW1
15. Page 9 of 17 17 10 2007 SMU 4000 Installation The SMU 4000 plug in SNMP management controller module can only be fitted to IRT s 4000 series modules that are capable of being SNMP upgradeable To determine whether a module is SNMP upgradeable a square section on the main PCB is silk screened and fitted with three multipin sockets as shown below 1J1 143 This is where the SMU 4000 plug in SNMP management controller module is fitted The three sets of multipins on the underside of the SMU 4000 line up with the three sets of multipin sockets on the main PCB module Align all pins and then gently press the SMU 4000 all the way down into place If the SMU 4000 is not already programmed with the correct firmware to match the module that it is being plugged into it then needs to be programmed via the pins on the topside of the SMU 4000 Note that installation will generally be done by IRT Electronics at the time of ordering Note also that an SMU 4000 will only be functionally operational when the main module that it is plugged into is fitted into an IRT 4000 series frame fitted with a CDM 4000 SNMP agent and being interrogated by a suitable Network Management System Figure 1 SMU 4000 module 4230 mmm amp 4230 mmx ib rev4 doc Page 10 of 17 17 10 2007 RS 422 pin assignments MMM 4230 RA RB MMX 4230 TA TB Connectors viewed from top 4230 mmm amp 4230 mmx ib rev4 doc Page 11 of 17 17 10 2007 The RS 422 Standard
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17. 2 TP 3 UP 4 0 30 86 1 27 00 3 85 2 23 14 7 71 3 19 28 11 57 4 15 43 15 43 5 23 14 3 85 3 85 6 19 28 7 71 3 85 7 15 43 11 57 3 85 8 15 43 7 71 7 71 9 11 57 11 57 7 71 19 28 3 85 3 85 B 15 43 7 71 3 85 3 85 C 11 57 11 57 3 85 3 85 D 11 57 7 71 7 71 3 85 7 71 7 71 7 71 7 71 Remote Note For Channel allocation selection by SNMP control the Data Rate switch SW 1 must be set to These data rates are only the maximum allowed for the channel Any lower rate may be used 4230 mmm amp 4230 mmx ib rev4 doc Page 8 of 17 17 10 2007 Installation Pre installation Handling This equipment may contain or be connected to static sensitive devices and proper static free handling precautions should be observed Where individual circuit cards are stored they should be placed in antistatic bags Proper antistatic procedures should be followed when inserting or removing cards from these bags Power AC mainssupply Ensure that operating voltage of unit and local supply voltage match and that correct rating fuse is installed for local supply DC supply Ensure that the correct polarity is observed and that DC supply voltage is maintained within the operating range specified Earthing The earth path is dependent on the type of frame selected In every case particular care should be taken to ensure that the frame is connected to earth for safety reasons See frame manual for de
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20. Total maximum data rate up to 43 5 Mb s is allowed Temporary packet stuffing is used to automatically bring the rate up to 45 Mb s Inputs are automatically equalised for lengths of up to 300m of Belden 8281 or equivalent cable RS422 9600 Baud uni directional data may also be sent on the same link Front panel indication and relay alarm on the MMM 4230 transmitter shows if there is an input data rate violation Corresponding alarm on the MMX 4230 receiver shows a loss of G 703 input An optional Simple Network Management Protocol SNMP plug in module is available for remote monitoring of input and output status control and alarm states The MMM 4230 and MMX 4230 are designed to fit IRT s standard Eurocard frames as well as IRT s 4000 series frame for use with IRT s SNMP system and may be used alongside any other of IRT s analogue or digital Eurocards Note Also available in a 34 Mb s G 703 version See Configuration switch settings section for configuration table Standard features e Up to 4 ASI and 1 Data stream on one 45 Mb s G 703 link Input rate stuffing to 45 Mb s G 703 rate Selectable input maximum data rates Automatic Input equalisation up to 300m Suitable for Single Frequency Network SFN use Optional SNMP plug in monitoring and control module Eurocard format 4230 mmm amp 4230 mmx ib rev4 doc Page 3 of 17 17 10 2007 MMM 4230 Inputs Type 1 Maximum Data Rate Channel Data Rate Assignments for 188 byte pack
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22. card and external signals 6HPx3Ux220 mm IRT Eurocard SNMP plug in module for use with 4000 series frame fitted with SNMP Agent Also available in a 34 Mb s G 703 version Due to our policy of continuing development these specifications are subject to change without notice 4230 mmm amp 4230 mmx ib rev4 doc Page 4 of 17 17 10 2007 Configuration Link settings 4230 CONFIGURATION INFORMATION Program 4230mmm tdf LK6A Installed LK1 IN When using Switch 1 position A Variable Bandwidth if the frequency of an input that has an assignment of 26 8Mb s falls below 13 4Mb s then the assignment will revert to 13 4Mb s All other conditions mentioned in the Variable Bandwidth section still apply OUT The frequency resetting mentioned above does not occur LK2 IN Existing Reed Solomon encoding on ASI streams will pass through system If no RS is present on the input then RS encoding is added OUT Reed Solomon encoding added to input ASI steams regardless of whether existing RS encoding exists or not LK3 Not used LK4 IN Output G 703 signal will be framed OUT Output G 703 signal will be unframed LK5 IN Output unshaped recommended for output drive lengths gt 68m 225ft OUT Output shaped recommended for output drive lengths 68m 225ft LK7 Installing this link will terminate the RS 422 data line Note Not applicable for 34 Mb s E3 version MMX 4230 CONFIGURATION
23. ent status for communication to the VMS when the NMS sends a request for information In the event of a major alarm from any of the SNMP compatible modules or power supplies a trap is automatically sent by the CDM 4000 agent to the NMS without any prompting by the NMS This alerts the operator to any fault conditions that may exist that need immediate attention FRU 4000 110 240 V 50 60 Hz FRAME 0 7 A max In T FUSES 220240 Vac 500 mA SB 110120 Vac 1A SB RS232 Ethernet IRT SNMP Connections IRT modules fitted DM 4 with SMU 4000 Bae 000 IRT 4000 Series Frame Ethernet Cable Ethernet Cable IRT modules fitted DM 4 with SMU 4000 m 000 IRT 4000 Series Frame Ethernet Cable IRT 4000 Series SNMP Setup 4230 mmm amp 4230 mmx ib rev4 doc Page 15 of 17 17 10 2007 Maintenance amp storage Maintenance No regular maintenance is required Care however should be taken to ensure that all connectors are kept clean and free from contamination of any kind This is especially important in fibre optic equipment where cleanliness of optical connections is critical to performance Storage If the equipment is not to be used for an extended period it is recommended the whole unit be placed in a sealed plastic bag to prevent dust contamination In areas of high humidity a suitably sized bag of silica gel should be included to deter corrosi
24. er controls are in the OFF position Maintenance personnel should observe all safety regulations Do not make any adjustments inside equipment with power ON unless proper precautions are observed internal adjustments should only be made by suitably qualified personnel operational adjustments are available externally without the need for removing covers or use of extender cards 4230 mmm amp 4230 mmx ib rev4 doc Page 2 of 17 17 10 2007 IRT Eurocard Types MMM 4230 amp MMX 4230 4 Channel ASI to G 703 Multiplexer De Multiplexer General Description MMM 4230 MMX 4230 Processing amp Mux amp Signal Processing De Mux 9 703 G 703 Output Input The MMM 4230 and MMX 4230 are part of a family of data transcoders for converting between the commonly used MPEG2 Transport Stream formats for video distribution in the broadcast industry With the MMM 4230 up to four ASI and one RS422 data signals can be multiplexed together and converted into a framed or unframed DS3 signal for transmission down a single 45 Mb s G 703 line The MMX 4230 converts and demultiplexes the 45 Mb s G 703 signal back into the original four ASI signals at their original rates and the RS422 data signal An on board switch on the MMM 4230 sets the maximum data rates for each ASI input allowing the efficient use of the available bandwidth and for protection against overuse of the bandwidth by the other channels
25. et length signals Type 2 Output Type Electrical Characteristics Data Rate Alarm Output MMX 4230 Input Type Electrical Characteristics Data Rate Outputs Type 1 Data Rate Type 2 Alarm Output Power Requirements Power consumption Other Temperature range Mechanical Finish Front panel Rear assembly Dimensions Optional Accessories NOTE Technical Specifications 4 x 750 800 mVp p BNC connector 40 1 Mb s for 188 byte packet 43 5 Mb s for 204 byte packet I P1 I P2 IP3 1 4 8 400 0 0 0 35 5 0 0 30 10 0 O 25 15 0 0 20 20 0 O0 30 5 5 0 25 10 5 O 20 15 5 O0 20 10 10 O 13 5 13 5 13 5 0 Variable 20 10 5 5 15 15 5 5 15 10 10 5 10 10 10 10 RS422 9600 Baud Uni directional 1x G 703 75 BNC connector B3ZS encoded 44 736 Mb s Contact closure on error loss of power 1x G 703 75 BNC connector B3ZS encoded 44 736 Mb s 4 x 750 800 mVp p BNC connector same as MMM 4230 input rate RS 422 9600 Baud Uni directional Contact closure on loss of G 703 input loss of power 28 Vac CT 14 0 14 or 16 Vdc 6 5 VA 0 50 C ambient Suitable for mounting in IRT 19 rack chassis with input output and power connections on the rear panel Grey silk screened black lettering amp red IRT logo Detachable silk screened PCB with direct mount connectors to Euro
26. ll not allow an instantaneous change in channel allocation so this should be disabled when using the above option by installing link LK1 4230 mmm amp 4230 mmx ib rev4 doc Page 7 of 17 17 10 2007 4230 34Mb version Maximum payload Data Rate Channel Data Rate Assignments for 188 byte packet length signals 30 86 Mb s for 188 byte packet 33 5 Mb s for 204 byte packet I P1 I P2 30 0 27 38 23 77 19 11 5 15 4 15 4 23 3 8 19 7 7 15 4 11 5 15 4 7 7 11 5 11 5 19 3 8 15 4 7 7 11 5 11 5 11 5 7 7 77 71 IP3 I P4 Mb s 0 0 0 0 0 0 0 O 0 0 3 8 0 3 8 0 3 8 0 7 7 0 7 7 0 3 8 0 3 8 38 3 8 38 7 7 38 7 7 77 In particular for 204 byte packets the following allocation is possible Channel Data Rate Assignment Switch 1 Position UP1 UP2 UP3 UP4 0 33 5 1 29 31 4 18 2 25 12 8 37 3 20 93 12 56 4 16 75 16 75 5 25 12 4 18 4 18 6 20 93 8 37 4 18 7 16 75 12 56 4 18 8 16 75 8 37 8 37 9 12 56 12 56 8 37 20 93 4 18 4 18 B 16 75 8 37 4 18 4 18 C 12 56 12 56 4 18 4 18 D 12 56 8 37 8 37 4 18 E 8 37 8 37 8 37 8 37 F Remote And for 188 byte packets the following is true Switch 1 Position Channel Data Rate Assignment UP1
27. nterface between the NMS and the managed devices The NMS sends a request message and control commands for the managed devices to the agent which in turn sends a response message containing information about the managed devices back to the NMS A managed device contains an SNMP agent and resides on a managed network Managed devices collect and store management information and make this information available to VMSs using SNMP Managed device agent variables are organised in a tree structure known as a Management Information Base MIB Within the MIB are parameters pertaining to the managed device An Object Identifier OID number within the MIB defines the managed device type This is a unique number specific to the model of managed device Other information relating to the device is also stored information such as alarm states controllable settings etc The MIB tree is organised in such a way that there will be no two MIB files with conflicting placements Normally an NMS polls an agent for information relating to the MIB in a managed device to be sent back to the NMS When certain conditions are met within the MIB such as major alarm conditions for example the agent automatically sends what is known as a trap to the NMS without any prompting from the NMS This allows automatic notification of a predetermined event SNMP Block Diagram SNMP Agent NMP A Protocol Engine gt S gent IP SNMP Agent SNMP Agent Network Protocol
28. on Where individual circuit cards are stored they should be placed in antistatic bags Proper antistatic procedures should be followed when inserting or removing cards from these bags Warranty amp service Equipment is covered by a limited warranty period of three years from date of first delivery unless contrary conditions apply under a particular contract of supply For situations when Fault Found for repairs a minimum charge of 1 hour s labour at IRT s current labour charge rate will apply whether the equipment is within the warranty period or not Equipment warranty is limited to faults attributable to defects in original design or manufacture Warranty on components shall be extended by IRT only to the extent obtainable from the component supplier Equipment return Before arranging service ensure that the fault is in the unit to be serviced and not in associated equipment If possible confirm this by substitution Before returning equipment contact should be made with IRT or your local agent to determine whether the equipment can be serviced in the field or should be returned for repair The equipment should be properly packed for return observing antistatic procedures The following information should accompany the unit to be returned A fault report should be included indicating the nature of the fault The operating conditions under which the fault initially occurred Any additional information which may be of a
29. on the MMM 4230 sets the maximum data rates for each ASI input SWI For 204 byte packets the following allocation is possible x Channel Data Rate Assignment Switch 1 Position UP1 UP2 4 0 43 5 1 38 26 5 46 2 32 8 10 93 3 27 33 16 4 4 21 86 21 86 5 32 8 5 46 5 46 6 27 33 10 93 5 46 7 21 86 16 4 5 46 8 21 86 10 93 10 93 9 14 6 14 6 14 6 A Variable B 21 86 10 93 5 46 5 46 C 16 4 16 4 5 46 5 46 D 16 4 10 93 10 93 5 46 E 10 93 10 93 10 93 10 93 F Remote For 188 byte packets the following is true Channel Data Rate Assignment Switch 1 Position 1 UP2 UP3 UP4 0 40 10 1 35 26 5 03 2 30 22 10 07 3 25 18 15 11 5 4 20 14 20 14 5 30 22 5 03 5 03 6 25 18 10 07 5 03 7 20 14 15 11 5 03 8 20 14 10 07 10 07 9 13 47 13 47 13 47 A Variable B 20 14 10 07 5 03 5 03 C 15 11 15 11 5 03 5 03 D 15 11 10 07 10 07 5 03 E 10 07 10 07 10 07 10 07 F Remote Note For Channel allocation selection by SNMP control the Data Rate switch SW 1 must be set to These data rates are only the maximum allowed for the channel Any lower rate may be used 4230 mmm amp 4230 mmx ib rev4 doc Page 6 of 17 17 10 2007 Variable Bandwidth Channel Allocation Selection A For 188 byte packets the foll
30. owing allocation is possible Channel Data Rate Assignment UP 1 UP2 UP3 UP 4 40 2 26 8 13 4 26 8 13 4 26 8 13 4 13 4 13 4 13 4 13 4 13 4 13 4 13 4 13 4 13 4 40 2 13 4 26 8 26 8 13 4 26 8 13 4 13 4 13 4 5 z 40 2 13 4 26 8 13 4 26 8 26 8 13 4 40 2 13 4 26 8 13 4 26 8 If only one channel is present then the total bandwidth is allocated to that channel If two channels are present and one exceeds a rate of 13 4 Mb s then that channel will be assigned 26 8 Mb s and the other 13 4 Mb s However input 1 has priority over inputs 2 3 amp 4 input 2 has priority over inputs 3 amp 4 and input 3 has priority over input 4 So even if say channel 2 has an input rate above 13 4 Mb s and then input 1 s rate also increases above 13 4 Mb s then input 1 will be assigned the bandwidth of 26 8 Mb s whilst input 2 s will be relegated to 13 4 Mb s Once a channel has been assigned a bandwidth of 26 8Mb s it will retain the allocation until either its input signal is removed or until a channel with higher priority requires 26 8Mb s allocation or there are any three channels connected If three channels are present they will each be assigned 13 4 Mb s If four channels are present then channel 4 will not get any bandwidth The error concealment in the MMX 4230 wi
31. ssistance in fault location and remedy A contact name and telephone and fax numbers Details of payment method for items not covered by warranty Full return address For situations when Fault Found for repairs a minimum charge of 1 hour s labour will apply whether the equipment is within the warranty period or not Contact IRT for current hourly rate Ac ms pa pos Please note that all freight charges are the responsibility of the customer The equipment should be returned to the agent who originally supplied the equipment or where this is not possible to IRT direct as follows Equipment Service IRT Electronics Pty Ltd 26 Hotham Parade ARTARMON N S W 2064 AUSTRALIA Phone 61294393744 Fax 6129439 7439 Email service irtelectronics com 4230 mmm amp 4230 mmx ib rev4 doc Page 16 of 17 17 10 2007 Drawing 804900 804900 804900 804902 804902 804902 Sheet Drawing List Index Description 4230 4 Channel ASI to G 703 Multiplexer Schematic sheet 1 4230 4 Channel ASI to G 703 Multiplexer Schematic sheet 2 MMM 4230 4 Channel ASI to G 703 Multiplexer Schematic sheet 3 4230 G 703 to 4 Channel ASI De Multiplexer schematic sheet 1 4230 G 703 to 4 Channel ASI De Multiplexer schematic sheet 2 MMX 4230 G 703 to 4 Channel ASI De Multiplexer schematic sheet 3 4230 mmm amp 4230 mmx ib rev4 doc Page 17 of 17 17 10 2007
32. tails Signal earth For safety reasons a connection is made between signal earth and chassis earth No attempt should be made to break this connection Installation in frame or chassis See details in separate manual for selected frame type Signal Connections All ASI amp G 703 inputs and outputs by 750 BNC connectors Alarm output is via a two pin 0 1 header Alarm condition is when there is a short between these two pins This corresponds to either a loss of power or if there is an input data rate violation on the MMM 4230 or loss of power or a loss of G 703 input on the MMX 4230 RS 422 data input and output connections are made via HE 14 8 pin double row connectors on both the MMM 4230 and the MMX 4230 SNMP When used in an IRT FRU400 Frame with a CDM400 SNMP Module fitted the MMM 4320 and MMX 4320 can be interrogated by an SNMP Network Management System and certain functions can also be remotely controlled For instance the channel bandwidth assignment can be altered and any the RS errors that have occurred can be read SNMP Traps on alarm states can be optionally sent The MIB management information base associated with these devices has the following OIDs Object Identies Alarms Channel Present Channel Enabled Channel Measured Data Rate Channel Rate Alarm Channel Channel Packet size Bandwidth Allocation Framing FPGA Version Reset Trap Enable RS Errors 4230 mmm amp 4230 mmx ib rev4 doc
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