Comtech EF Data CDM-600/600L - Manual (Page 67)

CDM-600/600L Open Network Satellite Modem Revision 3
Rear Panel Connector Pinouts MN/CDM600L.IOM
3–7
3.3.4.1.1 T1/E1 RJ-48 Connection via P7 Balanced G.703 Interface Connector
For T1/E1 operation via RJ-48 user interface, the optional CN-0000268 Adapter, shown in
Figure 3-2, may be purchased from Comtech EF Data to adapt the P7 Balanced G.703 DB-15F
connector to an RJ-48 female connection.
Figure 3-2. CN-0000268 DB-15M Æ RJ-48F Adapter for T1/E1 Operation
The pin assignments for the user and modem sides of the CN-0000268 Adapter are as follows:
Pin #
Signal Name
RJ-48 (User Side) DB-15M (Modem Side)
1 9 Tx+
2 1 Tx-
3 2 GND
4 11 Rx+
5 3 Rx-
6 4 GND
7 -- --
8 -- --
3.3.4.2 J10A IDI, J11A DDO Connectors, 75Ω BNC
Two female BNC 75
Ω connectors are provided for Drop and Insert (D&I)
unbalanced operation at the G.703 data rate of E1 (2.048 Mbps). These are
the Insert Data In (IDI) and Drop Data Out (DDO) ports.
Another function of these connectors is for auxiliary G.703 data paths operating at 512, 1024, and
2048 kbps. When these rates are selected, the IDI port is the TX terrestrial G.703 input and the
DDO port is the RX G.703 output.
BNC Connector Description Direction
J10A IDI Insert Data Input In
J11B DDO Drop Data Output Out
User Interface Side (RJ-48 F) Modem Interface Side (DB-15M)