Comtech EF Data CRS-300 - TMI User Data Connectors; EIA-232;422;V.35 Connector, DB-25 F (CRS-316); Table 3-4. EIA-232;422;V.35 Connector

CRS-300 1:10 Redundancy Switch MN/CRS300.IOM
Switch Connectors and Pinouts Revision 19
3–7
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.
Table 3-4. EIA-232/422/V.35 Connector
Pin
Generic Signal Function
Direction
Circuit No.
EIA-422/530
EIA-232
V.35
13
Note 2
25
Note 2
12
Internal Transmit Clock ‘B’
Modem to DTE
114
ST B
---
SCT B
24
Transmit Clock ‘A’
DTE to Modem
113
TT A
DA
SCTE A
11
Transmit Clock ‘B’
DTE to Modem
113
TT B
---
SCTE B
23
Note 2
10
Receiver Ready ‘B’
Modem to DTE
109
RR
---
B
22
DCE Ready ‘B’
Modem to DTE
DM_B
DM_B
9
Receive Clock ‘B’
Modem to DTE
115
RT B
-
SCR B
21
Note 2
8
Receiver Ready ‘A’
Modem to DTE
109
RR A
CF
RLSD
Note 1
20 Note 2
7
Signal Ground
---
102
SG
AB
SG
19
Request to Send ‘B’ /
Ready for Receiving ‘B’
DTE to Modem
RS B RS B
6
DCE Ready ‘A’
Modem to DTE
DM_A
DM_A
18
Note 2
5
Note 2
17
Receive Clock ‘A’
Modem to DTE
115
RT A
DD
SCR A
4
Request to Send ‘A’ /
Ready for Receiving ‘A’
DTE to Modem
RS A RS A
16
Receive Data ‘B’
Modem to DTE
104
RD B
---
RD B
3 Receive Data ‘A’ Modem to DTE 104 RD A BB RD A
15
Internal Transmit Clock ‘A’
Modem to DTE
114
ST A
---
SCT A
2 Transmit Data ‘A’ DTE to Modem 103 SD A BA SD A
14
Transmit Data ‘B’
DTE to Modem
103
SD B
---
SD B
1 Shield --- 101 Shield AA FG
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.