Comtech EF Data SMS-7000, Installation And Operation Manual

Page: 67 / 148

SMS-7000 Modem Protection Switch Installation
Rev. 3 2–33
2.6.2.6 Balanced G.703/Drop & Insert Data (J3)
Primary data for IDR and D&I as well as one of three IBS data options (balanced
G.703/D&I data connector) is facilitated by using a 15-pin female D with one connector
per channel. The pinouts are shown in Table 2-14.
C AU TIO N
When using this port for other than IDR data, be certain there is no
connection to the J6 (EIA-422) or J1 (V.35) ports. When using G.703 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 2-14. Balanced G.703/Drop & Insert Data Connectors (J3)
Signal Name
Pin # IBS IDR D&I
1 SD A SD A DDI-A
2 GND GND GND
3 RD A RD A IDO-A
4 GND GND GND
5 Open Open DDO-B
6 Open Open IDI-B
7 EXC_A EXC_A EXC_A
8 EXC_B EXC_B EXC_B
9 SD B SD B DDI-B
10 Open Open Open
11 RD B RD B IDO-B
12 Open Open DDO-A
13 Open Open IDI-A
14 Open Open Open
15 Open Open Open