Table 4-3. Cdm-710 Interface Card Combinations; Cdm-710 Modem Connections - Comtech EF Data CRS-300 Installation And Operation Manual

CRS-300 1:10 Redundancy Switch
Cables and Connections
4.9

CDM-710 Modem Connections

When adding a modem to an operating 1:N system, you must take care not to interfere with the
existing traffic. The cabling, power-up sequence, and communication connections must be
correct to avoid contention in the system from the modem Tx carrier. This information is
detailed in Sect. 6.2.2.5 CONFIG: ACTIVE (Activate Modems).
4.9.1 RMI/TMI Limitations and Considerations
1) Traffic modems with differing data types are not supported by the Redundant
Modem. For example, the Switch can not be populated with Traffic modems
with ASI and Traffic modes with HSSI.
2) Depending on the traffic data type, the appropriate jumper settings are
provided on the Switch TMI to ensure proper operation for HSSI with CA/TA
signals using the CRS-336 TMI. See Chapter 5. MODEM, TMI,
CONFIGURATION for this important configuration information.
4.9.2 Interface Combinations
The two plug-in interface module slots in the CDM-710 allow for many possible interface card
combinations. The Switch can cover many of these combinations, but not all – capability is
limited by the Switch's backplane configuration. For example, if you configure the Switch
backplane to handle one HSSI interflow, then this limits the supported Redundant and Traffic
modems to one HSSI interface per unit as well. Table 4-3 details the CDM-710 interface card
combinations that are compatible with the Switch.
CDM-710 Modem Configuration
Interface Slot 1
ASI (CDI-40)
ASI (CDI-40)
HSSI (CDI-60)
None
HSSI (CDI-60)
Notes:
1) The Redundant Modem must have the same interface cards in each slot as any of the Traffic
Modems.
2) The Traffic Modem must have either the same interface cards in each slot as any of the
other Traffic Modems have, or a blank panel installed.
3) Interface Slots 1 and 2 are not active simultaneously.

Table 4-3. CDM-710 Interface Card Combinations

Interface Slot 2
None
GbE (CDI-70)
None
GbE (CDI-70)
GbE (CDI-70)
1:N CRS-300 Configuration
TMI Card RMI Card
CRS-325 CRS-306
CRS-306
CRS-336
4–68
MN/CRS300.IOM
Revision 19
SWITCH
AND
Notes
-
Can be used as
Redundant Modem
-
-
Can be used as
Redundant Modem