172APPENDIX D: CONNECTORS AND CABLES

ISDN U Cable To connect a model 44x or model 54x bridge/router to an ISDN network, use a Category 5 shielded twisted-pair cable with an RJ-45 connector on the bridge/router end, and an RJ-11 connector at the wall. This cable comes with your bridge/router.

Figure 26 shows the pinouts of the ISDN U cable.

Figure 26 ISDN U Cable

To WAN port

 

To wall outlet

1 2 3 4 5 6 7 8

 

12 3 4 5 6 7 8

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

RJ-45 male (shielded)

 

RJ-11 male (shielded)

 

 

 

 

 

Name

Pin

 

Pin

Name

Not connected

1

 

1

Not connected

Not connected

2

 

2

Not connected

Not connected

3

 

3

Not connected

Ring

4

 

4

Ring

 

Tip

5

 

5

Tip

 

Not connected

6

 

6

Not connected

Not connected

7

 

7

Not connected

Not connected

8

 

8

Not connected

 

 

 

 

 

 

 

 

 

 

Page 172
Image 172
3Com SuperStack II, NETBuilder SI manual Shows the pinouts of the Isdn U cable