Comtech EF Data SMS-7000, Installation And Operation Manual

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Installation SMS-7000 Modem Protection Switch
2–30 Rev. 3
2.6.2.3 Engineering Service Channel Data (J4)
The engineering service channel data connector is a 25-pin female D for IBS and D&I
data service. There is one connector per channel. The pinouts are shown in Table 2-11.
Table 2-11. Engineering Service Channel Data Connectors (J4)
Signal Name
Pin # IBS IDR D&I
1 SHIELD SHIELD
2 TXD A TXD A
3 RXD A RXD A
4 RTS/CTS C RTS/CTS
5 RTS/CTS A RTS/CTS
6 DSR B DSR
7 GND L GND
8 E
9
10
11
R
12 E
13 M
14 TXD B O TXD B
15 TXCK V TXCK
16 RXD B E RXD B
17 RXCK D RXCK
18
19
20
EXC A
21
22
23
EXC B
24 SCTE A (TT)