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174 APPENDIX D: CONNECTORS AND CABLES
RJ-48 T1 Cable To connect a model 46x or model 56x bridge/router to a T1 or fractional
T1 line, use a cable with an RJ-48 connector. 3Com does not supply this
cable.
Figure 27 shows the pin assignments of the cable with both ends
terminated in RJ-48 connectors.
Figure 28 RJ-48 T1 Cable
Serial Connectors
and Flex-WAN
Cables
The serial connectors on the bridge/router can be connected to DTE and
DCE devices with the following interfaces:
■ RS-232
■ V.35
■ X.21
■ RS-449
■ RS-530 (DCE only)
RJ-48S male (shielded)
To WAN port To wall outlet
12345 786
RJ-48S male (shielded)
12345 786
Name Abbr. Pin Pin Abbr. Name
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
R1
T1
NC
R
T
NC
NC
NC
R1
T1
NC
R
T
NC
NC
NC
Receive ring from network
Receive tip from network
Not connected
Transmit ring to network
Transmit tip to network
Not connected
Not connected
Not connected
Receive ring from network
Receive tip from network
Not connected
Transmit ring to network
Transmit tip to network
Not connected
Not connected
Not connected