Comtech EF Data SMS-7000 - Manual (Page 54)

Installation SMS-7000 Modem Protection Switch
2–20 Rev. 3
2.6 DSU Data Connections (J1 through J10)
There are 10 data cables between the modem face of the DSU and 10 possible modems
associated with the switch. Each of the eight prime modems has an associated data cable
connector, CH1 through CH8 (J1 through J8). The two backup modems are connected
with data cables to BU1 and BU2 (J9 and J10). The cable terminations are 50-pin male D
connectors. The signal/pin assignments, as they occur for each data configuration, are
listed in Table 2-3.
Table 2-3. DSU Data Connections (J1 through J10)
Signal Name
Overhead Type SDM-100 and No Overhead
Pin # IBS IDR D&I EIA-422 V.35 EIA-232
1 GND GND GND GND GND GND
2 GND GND GND
3 AGC-OUT AGC-OUT AGC-OUT
4 TXD-B 8K-TXO-A
5 TXD-A 8K-TXO-B
6 RXD-B 8K-RXO-A
7 RXD-A 8K-RXO-B
8 RS422RXO-A BWO1-C
9 RS422RXO-B BWO2-C
10 PRI-COM BWO3-C
11 SEC-COM BWO4-C
12 SCTE/TT-A BWI-1 TT-A SCTE-A TT
13 SCTE/TT-B BWI-2 TT-B SCTE-B
14 RS422TXO-A BWI-3
15 RS422TXO-B BWI-4
16 DF-COM
17 DMA
18 G703_SDB SD-B DDI-B
19 EXC-B EXC-B EXC_B EXC-B EXC-B
20 G703_RDB RD-B IDO-B
21 SCT/ST-A 8K-TXC-A ST-A SCT A ST
22 SCT/ST-B 8K-TXC-B ST-B SCT B