ADTRAN Express 4100 - Manual (Page 158)

Appendix B. Log Messages
B-14 Express 4100/4110 User Manual 61200176L2-1
L1 not up
level 2
A call attempt was stopped because ISDN layer 1 is down.
L2 not up
level 2
A call attempt was stopped because ISDN layer 2 is down trying to get
first TEI.
L2 #2 not up
level 2
A call attempt was stopped because ISDN layer 2 is down trying to get
second TEI.
L3 not up
level 2
A call attempt was stopped because ISDN layer 3 is down trying to regis-
ter first SPID.
L3 #2 not up
level 2
A call attempt was stopped because ISDN layer 3 is down trying to regis-
ter second SPID.
LDN TOO LONG
level 1
The number in either LDN 1 or LDN 2 is longer than 20 characters.
NETWORK BUSY
level 2
Called location was busy or network could not route call.
Network down
level 4
The ISDN network is unavailable due to layers 1,2 or 3 dropping.