Specifications

DMD20/20LBST Universal Satellite Modem Rear Panel Interfaces
MN-DMD20-20LBST Revision 14 5–16
5.8.4 G.703 BAL (J4)
The G.703 Interface Port (Balanced) is a 15-Pin Female “D” Connector. Refer to Table 5-9 for
pinouts.
Table 5-9. G.703 BAL Port 15-Pin Female “D” Connector (J4)
Pin No. Signal Name Signal Direction
1 Send Data (-) SD-A Input
2 Ground GND ---
3 Receive Data A (-) RD-A Output
4 Ground GND ---
5 Drop Data Out (+) DDO-B Output
6 Insert Data In (+) EXC (+) IDI-B Input
7 External Clock A (-) BAL EXC-A Input
8 External Clock B (+) BAL EXC-B Input
9 Send Data (+) SD-B Input
10 No Connection --- ---
11 Receive Data B (+) RD-B Output
12 Drop Data Out (-) DDO-A Output
13 Insert Data In (-) EXC (-) IDI-A Input
14 Mod Fault MOD-FLT
Open Collector
Output
15 Demod Fault DMD-FLT
Open Collector
Output