ADTRAN 1203086L1, Manual

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Chapter 8. Troubleshooting
61203086L1-1 ISU 512e User Manual 8-5
IF THE DISPLAY READS SPID<1,3,5, OR 7>
If the ISU 512e reads SPID1 , then the ISU 512e is physically connected
to the local telephone service provider and has established Logical
Layer 2. The ISU 512e is unable to establish Layer 3. The problem is
with one or more of the following:
• The ISU 512e software setup
• The software setup of the telephone service provider
To isolate the problem, use the following procedure:
1. Ensure the ISU 512e is set up for the correct switch protocol.
2.
E nsure that the ISU 512e is set up with the correct SPIDs and
LDNs. Review ISDN Menu/SPID on page 6-3.
3. Connect another piece of functioning ISDN equipment to the
ISDN line.
4. With the ISU 512e connected to the ISDN line and powered up,
talk to your service provider's repair group and inform them you
have an ISDN basic rate line that appears physically OK but has
no Terminal Endpoint Identifier (TEI). Ask them to check the
ISDN line translation and ensure that the line supports dynamic
TEI allocation. Inform them that an NT1 and terminal adapter
device are connected to the ISDN line.
IF THE DISPLAY READS SPID<2,4,6, OR 8>
If the ISU 512e continues to read SPID2 , the ISU 512e has completely
initialized the first phone number but is unable to establish Logical
Layer 3 for the second phone number. The problem is with one or
more of the following:
• The ISU 512e software setup
• The software setup of the telephone service provider
To isolate the problem, perform the following procedure.