Tmi User Data Connectors; Table B-4. "J2" Eia-422/530 / V.35 / Sync Eia-232 User Data Connector - Comtech EF Data CRS-311 Installation And Operation Manual

CRS-311 1:1 Redundancy Switch
Appendix B
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
1 Shield
14 Transmit Data B
2 Transmit Data A
15 Internal Transmit Clock A
3 Receive Data A
16 Receive Data B
4 Request to Send A / Ready for Receiving A
17 Receive Clock A
5 Not used
18 Not used
6 DCE Ready A
19 Request to Send B / Ready for Receiving B
7 Signal Ground
20 Not used
8 Receiver Ready A
21 Not used
9 Receive Clock B
22 DCE Ready B
10 Receiver Ready B
23 Not Used
11 Transmit Clock B
24 Transmit Clock A
12 Internal Transmit Clock B
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.
Direction EIA-422/EIA-530
- Shield
DTE to Modem SD B
DTE to Modem SD A
Modem to DTE ST A
Modem to DTE RD A
Modem to DTE RD B
DTE to Modem RS A
Modem to DTE RT A
Modem to DTE DM_A
DTE to Modem RS B
- SG
Modem to DTE RR A
Modem to DTE RT B
Modem to DTE DM_B
Modem to DTE RR
DTE to Modem TT B
DTE to Modem TT A
Modem to DTE ST B
B–4
Revision 7
MN/CRS311.IOM
V.35 EIA-232 Circuit No.
FG AA 101
SD B - 103
SD A BA 103
SCT A DB 114
RD A BB 104
RD B - 104
RS A
SCR A DD 115
DM_A
RS B
SG AB 102
RLSD * CF 109
SCR B - 115
DM_B
B - 109
SCTE B - 113
SCTE A DA 113
SCT B - 114