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
4.4.2.3

Serial Data Interface Kit and Connection Examples

For all CDM-750/CDM-760 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/CDM-760 Block Diagram: User  Modem  Switch  Traffic
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/CDM-760 chassis:
Allowable CDM-750/CDM-760 Interface Operating Combinations
PIIC Slot 1
G.703 E3/T3
None
PIIC Slot 2
None
G.703 E3/T3
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MN/CRS170A.IOM