User guide

3-24 Cisco 2524 and Cisco 2525 Router User Guide
Connecting to the Network
Step 5 If you have an ISDN BRI module (without an integrated NT1 device), use a
straight-through RJ-45-to-RJ-45 cable to connect the ISDN BRI (RJ-45) port to
an NT1 device. (See Figure 3-24.)
Figure 3-24 Connecting the ISDN BRI Module to an NT1 Device
SERIAL 1
SERIAL 0
BRI 0
ISDN BRI port (RJ-45)
H5257
NT1 device
Router
Straight-through
RJ-45-to-RJ-45 cable
S/T interface
ISDN-BRI
ACTIVITY