Comtech EF Data SDM-300L3 - Manual (Page 65)

SDM-300L3 Satellite Modem Revision 1
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 75
Ω TX and RX
data interfaces. BNC connector MC (J4) supports the 75 Ω 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 supports access to IBS or IDR overhead signals. However,
this interface 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
T
15 DMDFL
T