Comtech EF Data CDM-625A, Installation And Operation Manual

Page: 91 / 756

CDM-625A Advanced Satellite Modem MN-CDM625A
Rear Panel Connectors and Pinouts Revision 4
3–9
3.2.2.2 G.703 Connectors
3.2.2.2.1 Balanced G.703 (DB-9F)
The Balanced G.703 connector is a 9-pin Type ‘D’ female connector. It is
used for single port G.703, D&I or D&I++. When used with Quad E1
operations, this connector serves Ports 1 and 2 of the Quad E1 interface.
Table 3-3. Balanced G.703 Connector Pinouts
(R>L)
Pin #
Signal Function
Serial G.703
Signal Function
D&I or D&I++
Signal Function
Quad D&I
5 Tx in (+) DDI (+) Port 1 Tx In (+)
9
Tx in (-) DDI (–) Port 1 Tx In (–)
4 – DDO (–) Port 1 Rx Out (–)
8
–
DDO (+) Port 1 Rx Out (+)
3 GND
GND GND
7
– IDI (+) Port 2 Tx In (+)
2
–
IDI (–) Port 2 Tx In (–)
6 Rx Out (+) IDO (+) Port 2 Rx Out (+)
1
Rx Out (–) IDO (–) Port 2 Rx Out (–)
3.2.2.2.2 Aux G.703 (DB-9F)
The Auxiliary G.703 connector is a 9-pin Type ‘D’ female connector. When
used with Quad E1 operations, this connector serves Ports 3 and 4 of the
Quad E1 interface.
Table 3-4. Auxiliary G.703 Connector Pinouts
(R>L)
Pin #
Signal Function
Serial G.703
Signal Function
Quad D&I
5 Tx in (+) Port 3 Tx in (+)
9
Tx in (-) Port 3 Tx in (–)
4 – Port 3 Rx Out (+)
8
–
Port 3 Rx Out (–)
3 GND
GND
7 – Port 4 Tx in (+)
2
–
Port 4 Tx in (–)
6 Rx Out (+) Port 4 Rx Out (+)
1
Rx Out (–) Port 4 Rx Out (–)