2 hssi connector pin assignments – Mocomtech CDM-QX User Manual
Page 62
CDM-Qx/QxL Multi-Channel Satellite Modem with DoubleTalk™ Carrier-in-Carrier® Revision
7
Rear Panel Connectors
MN/CDMQX.IOM
3–12
3.3.6.2
HSSI Connector Pin Assignments
The HSSI interface features a 50-pin female SCSI-2 connector
(mini-D), with pin assignments as follows:
Signal Function
HSSI
Signal
EIA-613
Circuit
Pin # (+,-)
Circuit
Direction
Comment
Signal Ground
SG
102
1, 26
Ground
Receive Timing
RT
115
2, 27
from DCE
DCE Available
CA
107
3, 28
from DCE
Receive Data
RD
104
4, 29
from DCE
Loopback circuit C
LC
undefined
5, 30
from DCE
Not used
Send Timing
ST
114
6, 31
from DCE
Signal Ground
SG
102
7, 32
Ground
DTE Available
TA
108/2
8, 33
to DCE
Terminal Timing
TT
113
9, 34
to DCE
Loopback Circuit A
LA
143
10, 35
to DCE
Not used
Send Data
SD
103
11, 36
to DCE
Loopback Circuit B
LB
144
12, 37
to DCE
Not used
Signal Ground
SG
102
13, 38
Ground
Not used
undefined
14, 39
Not used
TX DVALID
undefined
15, 40
Not used
Ext Carrier Off
16
to DCE
Not used
reserved (to DCE)
17, 42
Not used
reserved (to DCE)
18, 43
Not used
Signal Ground
SG
102
19, 44
Ground
Carrier Detect
undefined
20
from DCE
undefined
45
Not
used
undefined
21
Not
used
reserved (to DTE)
46
Not used
undefined
22, 47
from DCE
Not used
undefined
23, 48
from DCE
Not used
142
24, 49
from DCE
Not used
Signal Ground
SG
102
25, 50
Ground