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Chapter 11. Troubleshooting
82 ISU 128 User Manual 61202.029L2-1
E. With the ISU 128 connected to the line and powered up, talk to your
service provider's repair group and tell them you have an ISDN basic rate
line that appears physically okay but has no terminal endpoint identifier
(TEI). Ask them to check the line translation and ensure that the line
supports dynamic TEI allocation. Tell them that you have an NT1 and
terminal adapter device connected to the line.