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WAN Connector and Cables 173
56/64K CSU/DSU
Cable
To connect a model 45x or model 55x bridge/router to a data digital
service (DDS), use a cable with an RJ-48S connector. 3Com supplies this
cable.
Figure 27 shows the pin assignments of the cable with both ends
terminated in RJ-48S connectors.
Figure 27 CSU/DSU Cable
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
NC
NC
NC
T
R
R1
T1
NC
NC
NC
NC
T
R
Transmit ring to network
Transmit tip to network
Not connected
Not connected
Not connected
Not connected
Receive tip from network
Receive ring from network
Transmit ring to network
Transmit tip to network
Not connected
Not connected
Not connected
Not connected
Receive tip from network
Receive ring from network