4-15
Cisco 850 Series and Cisco 870 Series Access Routers Hardware Installation Guide
OL-5331-01
Chapter 4 Router Cabling Procedures
Connecting an ISDN S/T Port
Figure 4-11 Connecting the ISDN S/T Port to the ISDN Service Provider
Perform the following steps to connect the ISDN S/T port to the ISDN service provider:
Step 1
Connect one end of the orange ISDN S/T cable to the ISDN S/T port on the router.
Step 2
Connect the other end of the orange ISDN S/T cable to the S/T port on the NT1 box.
Step 3
Connect the first unshielded Category 5 cable from the U port on the NT1 box to the telephone line port
on the splitter.
Step 4
Connect the second unshielded Category 5 cable from the telecommunication service port on the splitter
to the wall jack to allow a link to the network service provider.
1 One end of the ISDN S/T cable that connects
to the ISDN S/T port on the router
5 ADSL splitter that is provided by the ADSL
service provider
2 Network termination 1 (NT1) box 6 Other end of the first unshielded Category 5
cable that connects to the telephone line port
on the splitter
3 Other end of the ISDN S/T cable that connects
to the S/T port on the NT1 box
7 One end of the second unshielded Category 5
cable that connects to the telecommunication
service port on the splitter
4 One end of the first unshielded Category 5
cable that connects to the U port on the NT1
box
8 Other end of the second unshielded
Category
5 cable that connects to the wall jack
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