Comtech EF Data CRS-311, Installation And Operation Manual

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CRS-311 1:1 Redundancy Switch Revision 7
Introduction MN/CRS311.IOM
1–15
1.3.7 CRS-351 Overhead Switch Module
The CRS ‐ 351 Overhead Switch Module ( Figure 1 ‐ 23 ) allows for connection of EIA ‐ 422, EIA ‐ 485 and
EIA ‐ 232 data interfaces for use with Overhead Framing . It also supports signaling for tactical
applications.
As explained in detail in the pertinent modem sections of Chapter 3. CABLES AND
CONNECTIONS , your equipment should be connected directly to the module “P1 User Interface”
port instead of connecting directly to the SLM ‐ 5650/5650A Traffic Modem’s “P1 Overhead Data”
port.
Figure 1-23.
CRS-351
Overhead
Switch Module
(PL/13154-1)
DB-25M
DB-50F