ADTRAN Express XLT - Manual (Page 126)

Chapter 4: Troubleshooting
110 Express XL/XLT User Manual 61200070L1-1
5. If the Loop Status in the Express XL/XLT Status menu continuously reads
Register SPID #1
, then the Express XL/XLT is physically connected to
your local telephone service provider and has established logical layer 2.
The Express XL/XLT is unable to establish layer 3. The problem is in one
or both of the following places:
• The Express XL/XLT software setup
• The telephone service provider’s software setup
To isolate the problem, perform the following procedure:
A. Ensure the Express XL/XLT is set up for the correct
switch type.
B. Make sure the line is multipoint.
C. Make sure the Express XL/XLT is set up with the correct
SPID and LDN. For example:
SPID1 = 20572270460101
SPID2 = 20572270470101
LDN 1 = 7227046
LDN 2 = 7227047
D. If possible, try another piece of functioning ISDN equip-
ment with a U-interface on the line.
E. With the Express XL/XLT connected to the line and pow-
ered up, talk to your service provider’s repair group and
tell them you have an ISDN basic rate line that appears
physically okay but is unable to register its SPID(s). Ask
them to check the line translation, ensure the line sup-
ports dynamic TEI allocation, and verify the SPIDs. Tell
them that you have an NT1 and terminal adapter device
connected to the line.