Comtech EF Data SMS-7000 User Manual
Page 67
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