Comtech EF Data CRS-500 - Manual (Page 204)

CRS-500 1:N Redundancy System Revision 2
Appendix B MN-CRS500
B–6
B.3 CRS-500 DSU TMI User Data Connectors
B.3.1 CRS-316 TMI – EIA-422/530, V.35, Sync EIA-232 Connector (DB-25F)
This “J2” DB-25F connector provides the EIA-232/422/V.35 User Data Interface 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.