Tmi User Data Connectors; Eia-232/422/V.35 Connector, Db-25F (Crs-316); Table 3-4. Eia-232/422/V.35 Connector - Comtech EF Data CRS-300 Installation And Operation Manual

CRS-300 1:10 Redundancy Switch
Switch Connectors and Pinouts
3.2.2

TMI User Data Connectors

3.2.2.1

EIA-232/422/V.35 Connector, DB-25F (CRS-316)

See Table 3-4 for the pinouts of the DB-25F EIA-232/422/V.35 User Data Interface connector – "J2"
on the CRS-316 TMI.
Pin Generic Signal Function
13 Note 2
25 Note 2
12 Internal Transmit Clock 'B'
24 Transmit Clock 'A'
11 Transmit Clock 'B'
23 Note 2
10 Receiver Ready 'B'
22 DCE Ready 'B'
9 Receive Clock 'B'
21 Note 2
8 Receiver Ready 'A'
20 Note 2
7 Signal Ground
Request to Send 'B' /
19
Ready for Receiving 'B'
6 DCE Ready 'A'
18 Note 2
5 Note 2
17 Receive Clock 'A'
Request to Send 'A' /
4
Ready for Receiving 'A'
16 Receive Data 'B'
3 Receive Data 'A'
15 Internal Transmit Clock 'A'
2 Transmit Data 'A'
14 Transmit Data 'B'
1 Shield
Notes:
1) "Receiver Ready" is an EIA-232-level control signal on a V.35 interface.
2) Do NOT connect signals to these pins – they are reserved for use by the redundancy system.
3) 'B' signal lines are not used for EIA-232 applications.
4) 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.

Table 3-4. EIA-232/422/V.35 Connector

Direction
Modem to DTE
DTE to Modem
DTE to Modem
Modem to DTE
Modem to DTE
Modem to DTE
Modem to DTE
---
DTE to Modem
Modem to DTE
Modem to DTE
DTE to Modem
Modem to DTE
Modem to DTE
Modem to DTE
DTE to Modem
DTE to Modem
---
3–7
Circuit No. EIA-422/530
114 ST B
113 TT A
113 TT B
109 RR
DM_B
115 RT B
109 RR A
102 SG
RS B
DM_A
115 RT A
RS A
104 RD B
104 RD A
114 ST A
103 SD A
103 SD B
101 Shield
MN/CRS300.IOM
Revision 19
EIA-232 V.35
--- SCT B
DA SCTE A
--- SCTE B
--- B
DM_B
- SCR B
CF RLSD
Note 1
AB SG
RS B
DM_A
DD SCR A
RS A
--- RD B
BB RD A
--- SCT A
BA SD A
--- SD B
AA FG