Cisco 700 series, Installation Manual

Page: 52 / 118

Connecting an ISDN (Digital) Telephone
Cisco 700 Series Router Installation Guide 4-4
You must provide the following equipment:
•
NT1 with two S/T interfaces and one U interface.
•
Telephone cable to connect digital telephone. (This cable is usually provided with the
telephone.)
•
ISDN U cable that connects the NT1 to the ISDN wall jack.
Take the following steps to connect the ISDN telephone and external power supply. This
procedure assumes you have connected the ISDN U port to the ISDN wall jack (see
Figure 4-1).
Step 1
Connect an RJ-45-to-RJ-45 cable (included) from the ISDN S/T port (on the rear
panel of the router) to the port labeled LINE on the ISDN telephone power
supply. (See Figure 4-2.)
Step 2
Connect the ISDN telephone RJ-45 cable to the port labeled PHONE on the
ISDN telephone power supply. (See Figure 4-2.)
Step 3
Connect the telephone power supply to the power outlet.
You can now use the ISDN telephone on the same ISDN line as the router.