Comtech EF Data CRS-200 REDUNDANCY SWITCH - Manual (Page 18)

CRS-200 COMTECH COMMUNICATIONS CORPORATION
CRS-200 REDUNDANCY SWITCH - OPERATIONS MANUAL PAGE 16
6 CONNECTOR PINOUTS
6.1 DATA CONNECTOR - 25 PIN ‘D’ TYPE MALE AND FEMALE
Pin Generic Signal description Direction RS422/ V.35 RS232 Circuit
EIA 530 No
2 Transmit Data A DTE to Modem SD A SD A BA 103
14 Transmit Data B DTE to Modem SD B SD B - 103
24 Transmit Clock A DTE to Modem TT A SCTE A DA 113
11 Transmit Clock B DTE to Modem TT B SCTE B - 113
15 Internal Transmit Clock A Modem to DTE ST A SCT A DB 114
12 Internal Transmit Clock B Modem to DTE ST B SCT B - 114
3 Receive Data A Modem to DTE RD A RD A BB 104
16 Receive Data B Modem to DTE RD B RD B - 104
17 Receive Clock A Modem to DTE RT A SCR A DD 115
9 Receive Clock B Modem to DTE RT B SCR B - 115
8 Receiver Ready A Modem to DTE RR A RLSD * CF 109
10 Receiver Ready B Modem to DTE RR B - - 109
23 External Carrier Off DTE to Modem - - - -
(RS232 ‘1' or TTL ‘low’ )
7 Signal Ground - SG SG AB 102
1 Shield - Shield FG AA 101
NOTES:
* Receiver ready is an RS232-level control signal on a V.35 interface
DO NOT connect signals to pins which are not shown - these pins are reserved for use by
the redundancy system
‘B’ signal lines are not used for RS232 applications
For X.21 operation, use the RS422 pins, but ignore Receive Clock if the Modem is DTE, and
ignore Transmit clocks if the Modem is DCE