Filter
Top Products
Chapter 4. Troubleshooting
4-4 Express 4110/4120 User Manual 61200176L3-1
C. Make sure the Express 4110/4120 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 equipment with
a U-interface on the line.
E. With the Express 4110/4120 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 is
unable to register its SPID(s). Ask them to check the line transla-
tion, ensure the line supports dynamic TEI allocation, and verify
the SPIDs. Tell them that you have an NT1 and terminal adapter
device connected to the line.
6. If the Loop Status in the Express 4110/4120 Status menu continuously
reads Getting TEI #2, the Express 4110/4120 has completely initial-
ized the first phone number but is unable to establish logical layer 2
for the second phone number. The problem is in one or both of the
following places:
• The Express 4110/4120 software setup
• The telephone service provider’s software setup
To isolate the problem, perform the following procedure:
A. Ensure the line is multipoint with two phone numbers.
B. Ensure that the Express 4110/4120 is set up with the correct SPID
and LDN. For example:
SPID1 = 20572270460101
SPID2 = 20572270470101
LDN 1 = 7227046
LDN 2 = 7227047
C. Try swapping SPID1 with SPID2 and LDN1 with LDN2. Deter-
mine if the problem is the second phone number or the quantity of
phone numbers.
D. If possible, try another piece of functioning ISDN equipment with
a U-interface on the line.
E. With the Express 4110/4120 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 is
unable to register its SPID(s). Ask them to check the line transla-
tion, ensure the line supports dynamic TEI allocation, and verify
the SPIDs. Tell them that you have an NT1 and terminal adapter
device connected to the line.