Specifications

DMD20/20LBST Universal Satellite Modem Rear Panel Interfaces
MN-DMD20-20LBST Revision 14 5–17
5.8.5 SWITCH INTERFACE (J5)
The Switch Interface Port is a 68-Pin High-Density Female Connector. Refer to Table 5-10 for
pinouts.
Table 5-10. SWITCH INTERFACE Port 68-Pin High-Density Female Connector (J5)
Pin No. Signal Name Signal Direction
1 G.703 Send Data Input A G.703B SD-A Input
2
Synchronous Data Send
Data Input - A
SYNC SD-A Input
3
IDR ESC Backward Alarm
Out - 1 Common
ESCBWO 1C No Direction
4 G.703 Insert Data Input – A G.703B IDI-A Input
5
Synchronous Data Send
Timing Output – A
SYNC ST-A Output
6
IDR ESC Backward Alarm
Out - 1 Normally Open
ESCBWO 1NO No Direction
7
Synchronous Data Terminal Timing
Input – A
SYNC TT-A Input
8
IDR ESC Backward Alarm
Out - 2 Normally Closed
ESCBWO 2NC No Direction
9
G.703 Drop Data Out A -
Synchronous Data Receive Timing
Output - A
DDO-A RT-A Output
10
IDR ESC Backward Alarm
Output - 3 Common
ESCBWO 3C No Direction
11
G.703 Insert Data Out A -
Synchronous Data Receive Data A
IDO-A RD-A Output
12
IDR ESC Backward Alarm
Output - 3 Normally Open
ESCBWO 3NO No Direction
13 External Clock Input - A BAL EXC-A No Connection
14 Ground GND ---
15 IDR ESC Audio Input Channel 1A ESCAUDTX 1A Input
16 IDR ESC Audio Input Channel 2A ESCAUDTX 2A Input
17 IDR ESC Audio Output Channel 1A ESCAUD RX 1A Output
18 IDR ESC Audio Output Channel 2A ESCAUD RX 2A Output
19 IDR ESC Backward Alarm Input - 3 ESCBWI 3 Input
20
IBS ES Transmit Data A IDR ESC
Backward Alarm Input 1
TXD-A BWI 1 Input
21 Mod Fault Open Collector Output MOD FLT
Output Open
Collector
22 IBS ES Receive Data Output - A ES RXD-A Output
23
IBS ES Data Set Ready
(RS-232 Only)
ES DSR No Connection