Cisco 1600R Guía de instalación descargar pdf (Pagina 56)

Cisco 1600 Series Router Hardware Installation Guide

Troubleshooting ISDN

A-8

Figure A-1 lists troubleshooting methods for ISDN-speciﬁc problems that might occur.

Figure A-1 Troubleshooting ISDN

Symptom Checks Causes and Solutions

Router is on:

OK LED (next to ISDN S/T port) is off

(Cisco 1603 and ISDN S/T WAN interface card).

• Is the SYSTEM OK LED

on?

• Are all ISDN cables

properly connected?

• Is the NT1 LED on?

• Possible router hardware

problem.

• Possible ISDN line

problem. Check with ISDN

service provider.

• Possible NT1 problem.

Router is on:

NT1 LED is off

(Cisco 1604 and ISDN U WAN interface card).

• Is the SYSTEM OK LED

on?

• Are all ISDN cables

properly connected?

• Is the ISDN line connected

to the router ISDN U port?

• Possible router hardware

problem.

• Possible ISDN line

problem. Check with ISDN

service provider.

• Possible ISDN line

problem. Check with ISDN

service provider.

1 2 ... 51 52 53 54 55 56 57 58 59 60 61 ... 87 88

Sin comentarios

Cisco 1600R Guía de instalación Pagina 56