Mocomtech CRS-300 4.7 CDM-700 Modem Connections , 4.7.1 RMI/TMI Limitations and Considerations , 4.7.2 Interface Combinations

CRS-300 1:10 Redundancy Switch Revision 16

Cables and Connections MN/CRS300.IOM

4–50

4.7 CDM-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.

4.7.1 RMI/TMI Limitations and Considerations

MPORTANT

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

using the CRS-336 TMI. Refer to Chapter 4. MODEM, TMI, AND SWITCH

CONFIGURATION for this important configuration information.

4.7.2 Interface 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 4-2 provides

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

G.703 (CDI-10)

None CRS-345 CRS-306 -

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

(CDI-50)

None CRS-325 CRS-306 -

GbE (CDI-70) Valid for Redundant modem

HSSI (CDI-60)

None CRS-336 CRS-306 -

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)

None

G.703 (CDI-10) CRS-345

CRS-306

HSSI (CDI-60) CRS-336 -

GbE (CDI-70) -

Mocomtech CRS-300 4.7 CDM-700 Modem Connections , 4.7.1 RMI/TMI Limitations and Considerations , 4.7.2 Interface Combinations

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.

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

using the CRS-336 TMI. Refer to Chapter 4. MODEM, TMI, AND SWITCH

CONFIGURATION for this important configuration information.

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 4-2 provides

details for the CDM-700 interface card combinations that are compatible with the CRS-300.

Table 4-2. CDM-700 Interface Card Combinations

Notes:

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

Traffic CDM-700s.