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CRS-300 1:10 Redundancy Switch Revision 16
Connector Pinouts MN/CRS300.IOM
6–4
6.2 TMI User Data Connectors
6.2.1 EIA-232/422/V.35 – DB-25F Connector (CRS-316)
Table 6-4 indicates the
pinout for
the DB-25F TMI User Data Interface connector (RS232/422/V.35):
J2 on the CRS-316.
Table 6-4. EIA-232/422/V.35 Connector
Pin Generic Signal Description Direction
EIA-422/
RS 530
V.35 EIA-232 Circuit No.
1 Shield - Shield FG AA 101
2 Transmit Data A DTE to Modem SD A SD A BA 103
3 Receive Data A Modem to DTE RD A RD A BB 104
4 Request to Send A /
Ready for Receiving A
DTE to Modem RS A RS A
6 DCE Ready A Modem to DTE DM_A DM_A
7 Signal Ground - SG SG AB 102
8 Receiver Ready A Modem to DTE RR A RLSD * CF 109
9 Receive Clock B Modem to DTE RT B SCR B - 115
10 Receiver Ready B Modem to DTE RR B - 109
11 Transmit Clock B DTE to Modem TT B SCTE B - 113
12 Internal Transmit Clock B Modem to DTE ST B SCT B - 114
14 Transmit Data B DTE to Modem SD B SD B - 103
15 Internal Transmit Clock A Modem to DTE ST A SCT A DB 114
16 Receive Data B Modem to DTE RD B RD B - 104
17 Receive Clock A Modem to DTE RT A SCR A DD 115
19 Request to Send B /
Ready for Receiving B
DTE to Modem RS B RS B
22 DCE Ready B Modem to DTE DM_B DM_B
23 Not Used
24 Transmit Clock A DTE to Modem TT A SCTE A DA 113
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.
TMI User Data Interface connector