3com 3012 (3C13612) User Manual

The Router 3013 router has an ISDN S/T port and the Router 3015 router has an 
ISDN U port. These routers perform data transfer in 2B+D mode and support both 
ISDN dial-up and leased line. See Table 15 on page 14 for the ISDN port attributes.

The ISDN S/T cable is a 4-core twisted pair cable. Both ends of the cable have 
RJ-45 connectors. The 3-pin and 6-pin connectors are at the sending end, and the 
4-pin and 5-pin connectors are at the receiving end.

The ISDN U cable is a 2-core twisted pair cable. One end has an RJ11 connector 
and the other end has an output terminal (OT) connector.

For illustrations and pinout details of the ISDN BRI cables, see Appendix A.

To connect the ISDN BRI port:

1 Turn off power to the router.

2 Confirm the type of ISDN line provided by the telecommunications service 

provider.

3 Connect the cable.

For the Router 3013:

a If the line is ISDN U, use an NT1 adapter. Insert one end of the S/T cable into 

the S/T port of the NT1, and the other end into the ISDN BRI port of the router.

b If the line is ISDN S/T, insert the cable directly into the ISDN BRI port of the 

router 

For the Router 3015, the line must be ISDN U.

Connect the RJ-45 connector to the ISDN BRI port of the router, and connect the 
output terminal (OT) end to the ISDN line through a telephone adapter.

Verify whether the router has been correctly installed by checking the following 
items:

■

There is airflow around the router

■

Power is connected correctly

■

The ground wire of the router is correctly connected

■

The router is connected to other devices, such as the console terminal