Comtech EF Data CRS-311 - Manual (Page 39)

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