CM ISDN SS7 to SIP signalling

[4309]

Hi,
here is my config:
1. Avaya CM 6.2.3 with public ISDN trunk to our PSTN provider
2. CM to internal dialer (3rd party) connected using SIP trunk

Internal dialer outbound calls going to PSTN provider thru CM. In case of destination numer is busy my PSTN provider sends cause 17 (user busy) with progress indicator. After some time provider sends disconnect with ISDN 16: Normal clearing. This causes CM to send SIP/2.0 100 Trying to internal dialer and normal disconnect at the end so finaly we have wrong dialer stats.

The question - is there any way to change such CM behaviour ? I would like CM to send "486 - Busy here" instead of "100 Trying" or "486 - Busy here" at the end instead normal disconnect.
Thanks.

 

[dialtonebone]

https://support.avaya.com/ext/index?page=content&id=SOLN265307

<<cause code table
Cause Code 17 should translate to SIP 486
The SOLN references CM 6.3 though... maybe it got better in 6.3 from 6.2.x?

Are you seeing the Cause 17 in your tracing of the ISDN trunk?

 

[4309]

Thanks for reply. First of all I mistyped my CM version, I have 6.3.15.
I took a look into mts traces and signalling shows Cause 17.

18 09:30:40.671 62 00003e0f <-- SETUP crv 0_4eaf
D-channel port number: 00003e0f
Protocol Discriminator: 08 call control
Call Reference Value: 02 4e af Origination 4eaf
Q.931 Message Type: 05 Setup
<- SENDING COMPLETE (a1)
<- BEARER CAPABILITY 90 90 a3 3.1 kHz audio, 64 kbps, A-law
| coding standard: CCITT
| transfer mode: circuit-mode
| layer 1 indent: layer 1
<- CHANNEL IDENT a1 83 85 B-ch num 5, pref
<- PROGRESS IND local pvt netwk |cv pub netwrk serv local usr, ORIGination is non-ISDN
<- CALLING PARTY NUMBER .................................. 22XXXXXXX
| type of number: national
| numbering plan: ISDN/telphny plan E.164/3 |cv ISDN/telphny pln
| presentation ind: presentation allowed
| screening: user provided not screened
<- CALLED PARTY NUMBER ................................... 607XXXXXX
| type of number: unknown type
| numbering plan: ISDN/telphny plan E.164/3 |cv ISDN/telphny pln

21 09:30:40.813 60 00003e0f ==> CALL_PROC crv 1_4eaf
D-channel port number: 00003e0f
Protocol Discriminator: 08 call control
Call Reference Value: 02 ce af Destination 4eaf
Q.931 Message Type: 02 Call Proceeding
=> CHANNEL IDENT a9 83 85 B-ch num 5, excl

22 09:30:41.794 60 00003e0f ==> DISC crv 1_4eaf (user busy)
D-channel port number: 00003e0f
Protocol Discriminator: 08 call control
Call Reference Value: 02 ce af Destination 4eaf
Q.931 Message Type: 45 Disconnect
=> CAUSE local pub netwk: 17. User busy
=> PROGRESS IND 82 88 local pub netwk, in-band info/pattern avail


After 32 secons PSTN provieder sends timeout (without progress):

83 09:31:13.375 60 00003e0f ==> REL crv 1_4eaf timer expiry !
D-channel port number: 00003e0f
Protocol Discriminator: 08 call control
Call Reference Value: 02 ce af Destination 4eaf
Q.931 Message Type: 4d Release
=> CAUSE local pub netwk: 102. Recovery on timer expiry 306

84 09:31:13.376 62 00003e0f <-- REL_COM crv 0_4eaf
D-channel port number: 00003e0f
Protocol Discriminator: 08 call control
Call Reference Value: 02 4e af Origination 4eaf
Q.931 Message Type: 5a Release Complete


I think problem is a PROGRESS indicator in frame 22 which causes CM to send SiP trying.