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