Comtech EF Data RCS20 - Manual (Page 120)

RCS20 M:N Redundancy Switch Revision 15
Electrical Interfaces MN-RCS20 and CD-RCS20
5–20
5.3.2 DDS20 – Universal Switch Back Panel Connectors
Figure 5-12 DDS20 Universal Switch – Back Panel Connectors
5.3.2.1 J1 | MODEM 1 through J8 | MODEM 8 68-Pin High Density Min DSUB
Female Connectors
Each connector, J1 | MODEM 1 through J8 | MODEM 8, connects to each prime modem. If a prime
channel is unused, then its corresponding connects should be left unconnected.
Pin No. Signal Name Signal Direction
1 G.703 Send Data Input A (-) G.703B SD-A Input
2 Synchronous Data Send Data Input -A (-) SYNC SD-A Input
3 IDR ESC Backward Alarm Out - 1 Common ESCBWO 1C ---
4 G.703 Insert Data Input - A (-) G.703B IDI-A Input
5 G.703 Drop Data Out A - Synchronous Data Send Timing Output - A G.703B DDO-A SYNC ST-A Output
6 IDR ESC Backward Alarm Out - 1 Normally Open ESCBWO 1NO ---
7 Synchronous Data Terminal Timing Input A SYNC TT-A Input
8 IDR ESC Backward Alarm Out - 2 Normally Closed ESCBWO 2NC ---
9 Synchronous Data Receive Timing Output - A SYNC RT-A Output
10 IDR ESC Backward Alarm Output - 3 Common ESCBWO 3C ---
11 G.703 Insert Data Out A - Synchronous Data Receive Data A IDO-A RD-A Output
12 IDR ESC Backward Alarm Output - 3 Normally Open ESCBWO 3NO ---
13 External Clock Input - A BAL EXC-A Input
14 Ground GND ---
15 IDR ESC Audio Input Channel 1A ESCAUDTX 1A Input
16 IDR ESC Audio Input Channel 2A ESCAUDTX 2A Input
17 IDR ESC Audio Output Channel 1A ESCAUD RX 1A Output
18 IDR ESC Audio Output Channel 2A ESCAUD RX 2A Output