Modem-To-User Data Interface Kit And Connection Examples - Comtech EF Data CRS-170A Installation And Operation Manual

CRS-170A L-Band 1:1 Redundancy Switch
Cables and Connections
4.6.2

Modem-to-User Data Interface Kit and Connection Examples

In addition to the control and IF switch-to-modem cabling shown in the previous section, a
number of data interface configurations are available for use with the CDM-700. The kits featured
in this section can be supplied with the CRS-170A for use with the CDM-700.
Figure 4-33. CDM-700 Block Diagram: User  Modem  Switch  Traffic
Figure 4-33 shows a block diagram typical for the kits shown in Sects. 4.5.2.1 through 4.5.2.3.
Separate interface cabling kits are needed for these CDM-700 data interfaces. For example,
Sect. 4.5.2.1 identifies the interface kits used for the CDI-10 Dual G.703 E3/T3/STS-1 and the
CDI-60 HSSI Data Interfaces. With the exception of the CDI-70 Gigabit Ethernet Data Interface
configuration shown in Sect. 4.5.2.4, where user-provided Ethernet cables and Layer 2 Switch
are used, one interface kit per 1:1 modem pair is required for each user interface (see examples
for specified quantities).
The data interface combinations allowable in Interface Slots 1 and 2 of the CDM-700 chassis are as
follows:
Interface Slot 1
Dual G.703 (CDI-10)
OC3 Optical (CDI-50-1) Single Mode
OC3 Copper (CDI-50-1)
HSSI (CDI-60)
GigE (CDI-70)
None
Allowable CDM-700 Combinations
Interface Slot 2
None
Dual G.703 (CDI-10)
HSSI (CDI-60)
GigE (CDI-70)
None
None
None
HSSI (CDI-60
GigE (CDI-70)
None
GigE (CDI-70)
Dual G.703 (CDI-10)
HSSI (CDI-60)
GigE (CDI-70)
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MN/CRS170A.IOM