Serial 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
4.3.6.3

Serial Data Interface Kit and Connection Examples

For all CDM‐750 serial data interface configurations, separate cabling kits are needed. For each
user interface, one interface kit per 1:1 modem pair is required (see examples for specified
quantities). For example, Sect. 4.3.2.3.1 identifies the interface kit used for the G.703 PIIC data
interface.
Figure 4‐23 shows a block diagram typical for the kits shown in this section. Note that this
cabling diagram is not applicable to the standard Gigabit Ethernet Data Interface configuration –
as shown in Sect. 4.3.2.1 and Figure 4‐22, user‐provided Ethernet cables and Layer 2 Switches
are used.
Figure 4-23. CDM-750 Block Diagram: User
Note that, while data interface cards may be installed into both Interface Option slots, only one
interface is operable at a given time.
The following table outlines the data interface operating combinations allowable in Interface Option
slots 1 and 2 of the CDM‐750 chassis:
Allowable CDM-750 Interface Operating Combinations
PIIC Slot 1
G.703 E3/T3
None
PIIC Slot 2
None
G.703 E3/T3
4–27
MN/CRS170A.IOM
Modem Switch
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