Mocomtech CRS-300 operation manual CDM-700 Modem Connections, Interface Combinations

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

4.7CDM-700 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.

4.7.1RMI/TMI Limitations and Considerations

1.Traffic modems with differing data types can all be supported by the Redundant Modem.

2.Depending on the traffic data type, the appropriate jumper settings are

provided on the TMI to ensure proper operation for HSSI with CA/TA signals

IMPORTANT using the CRS-336 TMI. Refer to Chapter 4. MODEM, TMI, AND SWITCH CONFIGURATION for this important configuration information.

4.7.2Interface Combinations

With (2) interface card slots available in the CDM-700 modem, there are many possible interface card combinations. The CRS-300 can cover many of these combinations, but not all. Table 4-2provides details for the CDM-700 interface card combinations that are compatible with the CRS-300.

Table 4-2. CDM-700 Interface Card Combinations

CDM-700 Modem Configuration			1:N CRS-300 Configuration				Notes
Interface Slot 1	Interface Slot 2		TMI Card		RMI Card
	None	CRS-345		CRS-306		-
G.703 (CDI-10)	G.703 (CDI-10)	CRS-345			CRS-306	-
	HSSI (CDI-60)	Not Supported		Not Supported			Exceeds backplane capability
	GbE (CDI-70)	CRS-345		CRS-306			Use wired-around GigE
							(see Chapter 3)
OC3 Copper	None		CRS-325	CRS-306		-
(CDI-50)	GbE (CDI-70)						Valid for Redundant modem
	None	CRS-336		CRS-306		-
HSSI (CDI-60)	HSSI (CDI-60)	None		None			Exceeds backplane capability
	GbE (CDI-70)	CRS-336		CRS-306			Use wired-around GigE
							(see Chapter 3)
GbE (CDI-70)	None		CRS-336	CRS-306		-
	GbE (CDI-70)						Use wired-around GigE
							(see Chapter 3)
	G.703 (CDI-10)	CRS-345				-
None	HSSI (CDI-60)		CRS-336		CRS-306	-
	GbE (CDI-70)					-

Notes:

1.The Redundant CDM-700 must have the same interface cards in each slot as any of the Traffic CDM-700s.

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