Comtech EF Data CRS-311 - Manual (Page 172)

CRS-311 1:1 Redundancy Switch Revision 7
Appendix B MN/CRS311.IOM
B–4
B.2 TMI User Data Connectors
B.2.1 CRS-316 – EIA-422/530, V.35, Sync EIA-232 Connector (DB-25F)
Table B‐4 indicates the pinout for the DB‐25F EIA‐232/422/V.35 User Interface connector: “J2” on
the CRS‐316 TMI.
Table B-4. “J2” EIA-422/530 / V.35 / Sync EIA-232 User Data Connector
Pin # Generic Signal Description Direction EIA-422/EIA-530 V.35 EIA-232 Circuit No.
1 Shield - Shield FG AA 101
14 Transmit Data B DTE to Modem SD B SD B - 103
2 Transmit Data A DTE to Modem SD A SD A BA 103
15 Internal Transmit Clock A Modem to DTE ST A SCT A DB 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
4 Request to Send A / Ready for Receiving A DTE to Modem RS A RS A
17 Receive Clock A Modem to DTE RT A SCR A DD 115
5 Not used
18 Not used
6 DCE Ready A Modem to DTE DM_A DM_A
19 Request to Send B / Ready for Receiving B DTE to Modem RS B RS B
7 Signal Ground - SG SG AB 102
20 Not used
8 Receiver Ready A Modem to DTE RR A RLSD * CF 109
21 Not used
9 Receive Clock B Modem to DTE RT B SCR B - 115
22 DCE Ready B Modem to DTE DM_B DM_B
10 Receiver Ready B Modem to DTE RR B - 109
23 Not Used
11 Transmit Clock B DTE to Modem TT B SCTE B - 113
24 Transmit Clock A DTE to Modem TT A SCTE A DA 113
12 Internal Transmit Clock B Modem to DTE ST B SCT B - 114
25 Not Used
13 Not used
Notes:
1. Receiver‐Ready is an EIA‐232‐level control signal on a V.35 interface.
2. 'B' signal lines are not used for EIA‐232 applications.
3. For X.21 operation, use the EIA‐422 pins, but ignore Receive Clock if the modem is DTE, and ignore
Transmit clocks if the modem is DCE.