2 g.703 connectors, 1 balanced g.703 (db-9f), 2 aux g.703 (db-9f) – Comtech EF Data CDM-625 User Manual
Page 77
CDM-625 Advanced Satellite Modem
Revision 15
Rear Panel Connectors and Pinouts
MN-CDM625
3–7
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 3-4. Balanced G.703 Connector Pinouts
Pin #
(R-L)
Signal Function
Serial G.703
Signal Function
D&I or D&I++
Signal Function
Quad D&I
1
Rx out -
IDO -
Port 2 Rx Out -
6
Rx out +
IDO +
Port 2 Rx Out +
2
IDI -
Port 2 Tx In -
7
IDI +
Port 2 Tx In +
3
GND
GND
GND
8
DDO +
Port 1 Rx Out +
4
DDO -
Port 1 Rx Out -
9
DDI -
Port 1 Tx In -
5
Tx in +
DDI +
Port 1 Tx In +
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 3-5. Auxiliary G.703 Connector Pinouts
Pin #
(R-L)
Signal Function
Serial G.703
Signal Function
D&I or D&I++
Signal Function
Quad D&I
1
–
–
Port 4 Rx out -
6
–
–
Port 4 Rx out +
2
–
–
Port 4 Tx in -
7
–
–
Port 4 Tx in +
3
–
–
GND
8
–
–
Port 3 Rx out -
4
–
–
Port 3 Rx out +
9
–
–
Port 3 Tx in -
5
–
–
Port 3 Tx in +