Async Interface Connector Pinouts - Comtech EF Data SDM-650B Installation And Operation Manual

Asynchronous Overhead Channel Unit
F.2 ASYNC Interface Connector Pinouts
The ASYNC interface is provided on a 50-pin female D connector accessible from the
rear panel of the modem. Screw locks are provided for mechanical security of the mating
connector.
GROUND
T1E1 SEND DATA A
T1E1 SEND DATA B
EXTERNAL CLOCK A
EXTERNAL CLOCK B
T1E1 RECEIVE DATA A
T1E1 RECEIVE DATA B
TX DATA B (ASYNC)
SEND DATA A
SCT SIGNAL A
TX DATA A (ASYNC)
SEND DATA B
SCT SIGNAL B
RX DATA B (ASYNC)
RECEIVE DATA A
RECEIVE CLOCK A
RX DATA A (ASYNC)
RECEIVE DATA B
RECEIVE CLOCK B
TRANSMIT TIMING A
REQUEST TO SEND A
REQUEST TO SEND B
TRANSMIT TIMING B
RECEIVER READY A
RECEIVER READY B
RS422 TX DATA A
CLEAR TO SEND B
DATA SET READY A
DATA SET READY B
CTS A
F–8
Signal Function
GND
T1E1-SDA
T1E1-SDB
EXCA
EXCB
T1E1-RDA
T1E1-RDB
TXD-B
SDA
SCT/STA
TXD-A
SDB
SCT/STB
RXD-B
RDA
SCR/RTA
RXD-A
RD-B
SCR/RTB
SCTE/TTA
RTSA
RTSB
SCTE/TTB
RLSD/RRA
RRB
R422TXDA
CTSB
DSR/DMA
DMB
CTSA
Name Pin #
1, 2
34
18
35
19
36
20
4
37
21
5
38
22
6
39
23
7
40
24
12
45
29
13
46
30
14
31
48
32
47
SDM-650B Satellite Modem
Rev. 5