Specifications

SDM-300L3 Satellite Modem Revision 0

Connector Pinouts MN/SDM300L3.IOM

3–11

3.2.4 G.703 T1, E1/ASYNC Interface Adapter

The G.703 T1, E1/ASYNC Interface Adapter has three BNC connectors and a 15-pin

subminiature D connector.

BNC connectors (SD (J2) and RD (J3) support the G.703 unbalanced 75Ω TX and RX

data interfaces. BNC connector MC (J4) supports the 75Ω unbalanced Master Clock

interface.

The 15-pin D connector (J5) supports the G.703 balanced TX and RX data, balanced

Master Clock, Open Collector mod and demod fault, and ASYNC overhead data

interfaces.

The following table shows the pinouts for the15-pin D connector.

IMPORTANT

This interface does not support either access to IBS or IDR overhead

signals or does not support D&I functions.

Pin # Signal

1 SD -

2 GND

3 RD-

4 GND

5 ETXB

6 ERXB

7 MC-

8 MC+

9 SD+

10 N.C.

11 RD+

12 ETXA

13 ERXA

14 MODFL

15 DMDFL