Comtech EF Data SMS-7000 - Manual (Page 61)

SMS-7000 Modem Protection Switch Installation
Rev. 3 2–27
2.6.2.1 EIA-422/8 kbit/s Terrestrial Data (J6)
This data port is used for IBS-422 terrestrial data or IDR 8 kbit/s terrestrial overhead
data. The connector is a 37-pin female D, with one connector per channel (Table 2-9).
C AU TIO N
When using this port for IBS or no overhead data, be certain there is no
connection to the J1 (V.35) or J3 (G.703) ports. When using EIA-422 data,
all data switch modules must have jumper JP1 in EIA-422 position (with
jumpers connecting the middle pin and the pin closest to the front of the
switch module).
Table 2-9. EIA-422 Terrestrial Data Connectors (J6)
Signal Name
Pin # IBS IDR D&I
1 SHIELD SHIELD
2
3
RS422 TXO-A 8K TXO A
4 SD A 8K TXD A
5 ST A 8K TXC A
6 RD A 8K RXD A C
7 RTS A RTS A A
8 RT A 8K RXC A B
9 CTS A CTS A L
10 E
11 DM A N/C
12 R
13 RR A N/C E
14 M
15 EXC A 8K RXO A O
16 RS422 RXO A N/C V
17 TT A N/C E
18 D
19 GND GND
20 GND GND
21 RS422 TXO-B 8K TXO B