P/N 1070334 (ML) • REV A • ISS 04AUG14
7 / 16
The next lines show some diagnostics:
•
A state: State of the main dialler process. Should be 0 if
there are no activities
•
B state: State of the alarm transmission protocol. Should
be 0 if offline.
•
X state: State of the X-25 alarm transmission protocol.
Should be 0 if offline (ATS7121 only).
Line status:
Indicates the status of the S0 bus line monitor:
•
0: activated
•
1: try to activate
•
2: try to activate S0 bus switched off
•
3: testing network
•
4: network failure
•
5: local S0 in bus failure
•
6: check local S0 bus
•
7: check NT
S0 bus activity:
Indicates the active sessions on the local S0
bus.
ISDN D-channel monitoring
While one is logged in to the ATS7120/ATS7121, the layers 2
and 3 D-channel messages will be displayed. This is a
powerful engineering tool for the installer and service engineer
that provides help in tracing the causes of equipment
malfunction. A minimum level of knowledge on the ISDN D-
channel messages is required to take full advantage of this
facility.
If the terminal is connected during power up, the user is able to
monitor the power up process. After power up the user can log
in the ATS7120/7121 ISDN by entering the default engineer
code 7812 followed by <CR>.
The following figure shows an example of an ISDN trace:
ISDN D-channel trace of a call from the ATS7120 to a
Central Station
Usr 064 INFO 020 029
cr=0010 SETUP 23
Net 064 INFO 029 021
cr=0010 CALL PROC
Usr 064 RR 030
Net 065 RR 015
Net 064 INFO 030 021
cr=0010 ALERTING
Usr 064 RR 031
Net 064 INFO 031 021
cr=0010 CONNECT
Usr 064 RR 032
Net 065 RR 015
Net 064 RR 021
Usr 064 RR 032
Net 065 RR 015
Net 064 INFO 032 021
cr=0010 DISCONNECT
Usr 064 RR 033
Usr 064 INFO 021 033
cr=0010 RELEASE
Net 064 INFO 033 022
cr=0010 RELEASE COM
Usr 064 RR 034
ISDN D-channel X25 monitoring (ATS7121 mode)
The ATS7121 will also display the X25 traffic on the D-channel,
together with the normal ISDN messages. This is a powerful
tool that can be used for troubleshooting. Typically the first
establishment of a connection will look as follows:
--> 48244
Usr 002 SABME
Net 002 UA
Net 002 INFO 000 000
LCN 0 RESTART REQ Cause 07 Diag 00
Usr 002 RR 001
Usr 002 INFO 000 001
LCN 0 RESTART REQ Cause 00 Diag 00
Usr 002 INFO 001 001
LCN 1 CALL REQ
Net 002 RR 001
Net 002 RR 002
Net 002 INFO 001 002
LCN 1 CALL ACCEPT
Usr 002 RR 002
! Connected
Usr 002 INFO 002 002
LCN 1 DATA
Net 002 RR 003
Net 002 INFO 002 003
LCN 1 RESET REQ Cause 80 Diag 00
Usr 002 RR 003
Usr 002 INFO 003 003
LCN 1 RESET CONF
Usr 002 INFO 004 003
LCN 1 DATA
Net 002 RR 004
Net 002 RR 005
Net 002 INFO 003 005
LCN 1 RESET REQ Cause 80 Diag 01
Usr 002 RR 004
Usr 002 INFO 005 004
LCN 1 RESET CONF
Usr 002 INFO 006 004
LCN 1 DATA
Net 002 RR 006
Net 002 RR 007
Net 002 INFO 004 007
LCN 1 RESET REQ Cause 80 Diag 02
Usr 002 RR 005
Usr 002 INFO 007 005
LCN 1 RESET CONF
Usr 002 INFO 008 005
LCN 1 DATA
Net 002 RR 008
Net 002 RR 009
Net 002 INFO 005 009
LCN 1 RR
Usr 002 RR 006
! TX Response (OK)
Usr 002 INFO 009 006
LCN 1 DATA
Net 002 RR 010
Net 002 INFO 006 010
LCN 1 RR
Usr 002 RR 007
! TX Response (OK)
Usr 002 INFO 010 007
LCN 1 DATA
Net 002 RR 011
Net 002 INFO 007 011
LCN 1 RR
Usr 002 RR 008
! TX Response (OK)
Usr 002 INFO 011 008
LCN 1 DATA
Net 002 RR 012
Net 002 INFO 008 012
LCN 1 RR
Usr 002 RR 009
! TX Response (OK)
Usr 002 RR 009
Net 002 RR 012
The following messages can be displayed by the dialler:
Message
Description
! Connected
The dialler is connected to the Central Station