Comtech EF Data CRS-500, Installation And Operational Manual

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CRS-500 1:N Redundancy System
Revision 4
Configure Modems for 1:N Redundancy 7–5 MN-CRS-500
e. Enable Packet Processor Redundancy mode for each modem. Typical for each
modem: In the ‘Redundancy Config’ section of the CDM-625/A HTTP (Web
Server) Interface ‘Redundancy’ page, use the drop-down menu to select ‘Packet
Processor Redundancy’ as “Enabled.” Click
[Submit] .
1. Packet Processor Redundancy mode is applicable only to
and must be selected in CDM-625/A systems where the
optional IP Packet Processor is installed and enabled.
2. It is recommended that only one of the available four 10/100
Ethernet Ports is used for traffic for each CDM-625/A at any
given time to prevent Ethernet loops. Refer to the CDM-
625/A Advanced Satellite Modem Installation and Operation
Manual for further information about using this operational
mode.
2. Complete these steps ONLY if you use the DoubleTalk® Carrier-in-Carrier® (CnC)
option with any CDM-625/A Traffic Modem:
a. The Pre-Mapped Symbol Interface (PMSI) is an EIA-485 multi-drop bus system
where one CDM-625/A transmits , and all other CDM-625/As on the multidrop
bus are configured to receive . Each CnC-enabled CDM-625/A’s PMSI connector
must be properly cabled using a CA-0000275 PMSI Multi-drop CnC® Plus Cable.
b. Each CnC-enabled CDM-625/A must be properly configured to ensure proper
operation within the CRS-500 1:N Redundancy System. To set PMSI for each
CnC-enabled Traffic Modem – from each modem front panel:
SELECT: Configuration

CnC

PMSI-control

Redundancy