Comtech EF Data CRS-500 - Manual (Page 114)

CRS-500 1:N Redundancy System Revision 2
Configuring Modems for 1:N Redundancy MN-CRS500
6–4
E. Enable Packet Processor Redundancy mode for each modem – (Typical for each
CDM-625) In the ‘Redundancy Config’ section of the CDM-625 Web Server Interface
‘Redundancy’ page, use the drop-down menu to select ‘Packet Processor Redundancy’
as “Enabled”, and then click [Submit].
1. Packet Processor Redundancy mode is applicable only to and must be
selected in CDM-625 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 at any given time
to prevent Ethernet loops. Refer to the CDM-625 Advanced Satellite
Modem Installation and Operation Manual for further information
about using this operational mode.
2. Complete the following tasks ONLY if the DoubleTalk ® Carrier-in-Carrier ® (CnC) option is
used with any CDM-625 Traffic Modem:
A. Each CnC-enabled CDM-625’s Pre-Mapped Symbol Interface (PMSI) connector must be
properly cabled using a CA-0000275 PMSI Multi-drop CnC ® Plus Cable.
(The PMSI is an EIA-485 multi-drop bus system where one CDM-625 transmits, and all
other CDM-625s on the multidrop bus are configured to receive.)
B. Each CnC-enabled CDM-625 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 CDM-625 front panel:
SELECT: Configuration  CnC  PMSI-control  Redundancy
6.5.2 C onfiguring C DM-750 Advanced High S peed Trunking Modems
Complete the following tasks on each CDM-750 modem:
1. Enable 1:N Mode for each modem – Because there are dual-purpose pins on the
redundancy connector, enable 1:N Mode for each modem via the CDM-750 front panel:
SELECT: Utility  1:N  set to Enable
2. Set up a unique IP Address for each modem – via the CDM-750 front panel menu:
SELECT: Configuration  IP  Address  Add/Range  Set address