Mocomtech CRS-300 operation manual CDM-710 Modem Connections, CDM-710 Interface Card Combinations

CRS-300 1:10 Redundancy Switch	Revision 16
Cables and Connections	MN/CRS300.IOM

4.8CDM-710 Modem Connections

If adding a modem to an operating 1:N system, care needs to be taken to not 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 Chapter 7.4.5 (CONFIG) ACTIVE MODEMS.

4.8.1RMI/TMI Limitations and Considerations

1.Traffic modems with differing data types are not supported by the Redundant Modem. For example, the CRS-300 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

IMPORTANT provided on the TMI to ensure proper operation for HSSI with CA/TA signals using the CRS-336 TMI. Refer to Chapter 4. MODEM, TMI, AND SWITCH CONFIGURATION for this important configuration information.

4.8.2Interface Combinations

With (2) interface card slots available in the CDM-710 modem, there are many possible interface card combinations. The CRS-300 can cover many of these combinations, but not all. capability is limited by the CRS-300’s backplane configuration. For example, if the CRS-300’s backplane is configured to handle one HSSI interflow, then the supported Redundant and Traffic modems are limited to one HSSI interface per unit as well. Table 4-3provides details for the CDM-710 interface card combinations that are compatible with the CRS-300.

Table 4-3. CDM-710 Interface Card Combinations

CDM-710 Modem Configuration		1:N CRS-300 Configuration			Notes
Interface Slot 1	Interface Slot 2	TMI Card	RMI Card
ASI (CDI-40)	None			-
		CRS-325	CRS-306
ASI (CDI-40)	GbE (CDI-70)				Can be used as
					Redundant Modem
HSSI (CDI-60)	None			-
None	GbE (CDI-70)	CRS-336	CRS-306	-
HSSI (CDI-60)	GbE (CDI-70)				Can be used as
					Redundant Modem

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 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.

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