READY indicators and the TE’s ability to place and receive calls, depending on the specific TE in use. If the READY indicators fail to illuminate or if you are unable to place or receive calls, see Sec- tion 3.0 Troubleshooting on page 5.
3.0 TROUBLESHOOTING
If you encounter problems during installation, the following lists possible symptoms and solutions. If these solutions fail to correct the problem, contact ADTRAN Technical Support at
888 4ADTRAN.
POWER indicator not illuminated.
•NT1 Type 400 needs replacement.
•Insufficient power to the NT1 Type 400.
ERROR indicators illuminated, READY indicators flash at a faster 8 Hz rate.
Network activation failure:
•Wall jack wiring is incorrect: Check wall jack.
•Problem with ISDN line: Contact telephone company.
ERROR indicators illuminated, READY indicators flash at a slow- er 1Hz rate.
Local bus failure:
•TE not connected: Connect TE.
•TE not receiving power from NT1: Consult TE documentation.
•TE not terminated properly: Correct termination.
•TE ISDN parameters not configured properly: Reconfigure TE (SPIDs, LDNs, switch type, etc.).
READY indicators do not illuminate.
•Problem with ISDN network: Contact telephone company.
•ISDN line not plugged into U jack: Plug ISDN line into U jack.
Unable to make or receive a call.
•TE is not compatible with ISDN network: Contact telephone company.
•TE ISDN parameters not configured properly: Reconfigure TE (SPIDs, LDNs, switch type, etc.).
NT1 T400 User Manual | 5 |