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CDM-600L Satellite Modem
Physical Description
Balanced G.703 connector Tx/Rx connector (P7)
A 15-pin 'D' type female (DB15-F) for balanced operation at the G.703 data rates of T1
(1.544 Mbps), E1 (2.048 Mbps), or T2 (6.312 Mbps).
Unbalanced G.703 Tx/Rx (J10B and J11B)
Two female BNC 75Ω connectors for unbalanced operation at the G.703 data rates of E1
(2.048 Mbps), T2 (6.312 Mbps), or E2 (8448 kbps).
IDI, DDO connectors (J10A and J11A)
Two additional female BNC 75Ω connectors for 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.
Remote Control interface connector (P4B)
The Remote Control connector is a 9-pin 'D' type male (DB9-M). Access is provided to
remote control ports of the modem, both RS-232 and RS-485.
Auxiliary Serial connector (P6)
This is an additional RS-232 serial port, which is only used when the modem is part of a
1:1 pair. It uses a USB Type B connector.
WARNING
Although this port uses a USB connector, the signals are not
USB compatible. DO NOT connect this port to the USB port of
a PC, or other computing device.
4–5
Revision 2
MN/CDM600L.IOM
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