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CRS-300 1:10 Redundancy Switch
Cables and Connections
4.9
CDM-710G 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
4.9.1
RMI/TMI Limitations and Considerations
1. Traffic modems with differing data types are not supported by the Redundant
IMPORTANT
2. Depending on the traffic data type, the appropriate jumper settings are
4.9.2
Interface Combinations
With (2) interface card slots available in the CDM-710G modem, there are several possible
interface card combinations. Table 4-4 provides details for the CDM-710G interface card
combinations that are compatible with the CRS-300.
Table 4-4. CDM-710G Interface Card Combinations
CDM-710G Unit Configuration
Interface Slot 1
G.703 (CDI-10-1)
G.703 (CDI-10-1)
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 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 .
Modem. For example, the CRS-300 can not be populated with Traffic modems
with ASI and Traffic modes with HSSI.
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
Interface Slot 2
None
GigE (CDI-70)
None
GigE (CDI-70)
GigE (CDI-70)
.
1:N CRS-300 Configuration
TMI Card
RMI Card
CRS-325
CRS-306
CRS-336
CRS-306
4–66
Revision 16
MN/CRS300.IOM
Notes
-
Can be used as
Redundant Unit
-
-
Can be used as
Redundant Unit
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