Q.931 ISDN Trace

[Jeppedal]

Hi!

I am not familiar with the Nortel Meridian, but have some experience with other systems. Is there any way of making traces for incomming/outgoing ISDN/QSIG/Q.931 traffic on a trunk? The best thing would be if I could get info about SETUP, CALL PROCEED, etc in plain text ... Could anyone please tell me how to initiate it?

Best regards
Paal E. Jeppedal

 

[xxvon]

Hi...
For tracing an isdn... U need to..

LD 96

ENL MSGO X (Outgoing)(X is the D-channel number)
ENL MSGI X (Incoming)

Please take note that... If the traffic for the qsig or isdn lines are too heavy, do not attempt to turn on... as it will INI the system....

 

[Jeppedal]

Hi!

Thanks for your response. I was able to do my traces, even if I think the format was a little bit cryptical ...

This is an example of what I get out of my other systems:

Best regards
Paal E. Jeppedal



Outgoing Message: SETUP
Call Reference: 04 77 (CR Flag Not Set)
Protocol Discriminator: Q.931 user-network call control protocol

BEARER CAPABILITY IE:
Coding Standard: CCITT standardized
Information Transfer Capability: Speech
Transfer Mode: Circuit-mode / Call independent signalling connection
Information Transfer Rate/Circuit Mode: 64 kbit/s
Layer 1 Protocol Identification: User information layer 1 protocol
Recommendation G.711 A-law

CHANNEL ID IE:
Interface Identifier Present: Interface implicitly identified; the interface which includes the D-channel carrying this information element is indicated.
Interface Type: Primary rate interface
Preferred/Exclusive: Indicated channel is preferred
D-channel Indicator: The channel identified is not the D-channel
Information Channel Selection/Primary Interface: As in following octets
Coding Standard: CCITT standard
Number: Channel is indicated by the number in the following octet
Channel Type: B-channel units
Channel number: 14

PROGRESS INDICATOR IE:
Coding Standard: CCITT standard
Location: Local private network e.g., PBX
Progress Description: Originating address is non-ISDN

CALLING PARTY IE:
Type of Number: National Number
Numbering Plan Identification: ISDN numbering plan
Presentation Indicator: Presentation Allowed
Spare, reserved
Screening Indicator: User provided, verified and passed
Calling Party Number: 24044840

CALLED PARTY IE:
Type of Number: Unknown
Numbering Plan Identification: ISDN numbering plan
Called Number: 1922790125680

 

[xxvon]

Hi....
ur one looks a bit strange maybe because u are using q.931 B-channel signalling. I am actually using D-channel and everythings looks as per what u like... like call setup... call proceed... call connecting...

DCH 10 IMSG ALERT REF 0000000D CH 8 13 TOD 10:11:00
FEAT :NAS

DCH 10 IMSG CONNECT REF 0000000D CH 8 13 TOD 10:11:00

DCH 10 OMSG CONN ACK REF 0000000D CH 8 13 TOD 10:11:00

DCH 10 OMSG DISC REF 0000000D CH 8 13 TOD 10:11:02
CAUSE :NORMAL CALL CLEARING

DCH 10 IMSG RELEASE REF 0000000D CH 8 13 TOD 10:11:02

DCH 10 OMSG REL COMP REF 0000000D CH 8 13 TOD 10:11:02

 

[Jeppedal]

Hi!

Your example gives the same information as I got from my Meridian. Is it possible to get more extended information from the SETUP message on calling / called-party, numbertypes, actual number, etc ...?

Best regards
Paal E. Jeppedal

 

[xxvon]

hi....
the details i give u is just a normal tie line details. as for isdn, u should be able to see the full information.