Product specifications

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