Chapter 3 Troubleshooting
Problem-Solving
3-14
Cisco 1760 Modular Access Router Hardware Installation Guide
78-13342-03
Table 3-4
Troubleshooting ISDN
WIC
Symptom
Check the Following
Possible Solutions
ISDN S/T
Router is on,
but the OK
LED on the
card is off.
Is the OK LED on?
If no, the router/WIC might be
malfunctioning. Contact your Cisco
reseller.
Are all ISDN cables
properly connected?
If yes, the ISDN line might be
malfunctioning. Check with your
ISDN service provider.
Is the NT1 LED on?
If no, the NT1 might be
malfunctioning.
ISDN U
Router is on,
but the NT1
LED on the
card is off.
Is the OK LED on?
If no, the router/WIC might be
malfunctioning. Contact your Cisco
reseller.
Are all ISDN cables
properly connected?
If yes, the ISDN line might be
malfunctioning. Check with your
ISDN service provider.