Cisco Systems 1700 manual Isdn S/T, Isdn U

Chapter 3 Troubleshooting

Table 3-4	Troubleshooting ISDN
WAN Interface
Card	Symptom(s)	Check the Following	Possible Causes

ISDN S/T	Router is on, but
	OK LED on card
	is off.

• Is the OK LED on the	• If no, the router might be
router front panel on?	malfunctioning. Contact your Cisco
	reseller.
• Are all ISDN cables	• If yes, the ISDN line might be
properly connected?	malfunctioning. Check with your ISDN
	service provider.

		• Is the NT1 on?	• If no, the NT1 might be malfunctioning.
ISDN U	Router is on, but • Is the OK LED on?		• If no, the router might be
	the NT1 LED on		malfunctioning. Contact your Cisco
	card is off.		reseller.
		• Are all ISDN cables	• If yes, the ISDN line might be
		properly connected?	malfunctioning. Check with your ISDN
			service provider.

•Is the ISDN line connected to the card ISDN U port?

•If yes, the ISDN line might be malfunctioning. Check with your ISDN service provider.

	Cisco 1700 Router Hardware Installation Guide
78-5405-03		3-11