Call Forward All setup problem between ISDX and CCM

Unanswered Question
Mar 31st, 2007
User Badges:

Hi All,

We have got an ISDX PABX connected to CCM 4.2 by DPNSS-Westel-QSIG connection (DPNSS from ISDX, Westel protocol converter, QSIG into CCM). The VG with E1 QSIG interface is Cisco 2800. Everything works fine except when an ISDX extension tries to setup CallFarwardAll to an extension in CCM. The setup fails with the the fault message on the ISDX. When I make an ISDN trace in the VG (see below) I can see that the VG accepts the procedure and sends back RELEASE signal with "Normal release" cause. Which it interpreted wrongly by ISDX or Westel and the procedure fails. Does anybody have any idea if there is any way around it? Did anybody try to connect CCM to ISDX via Westel DPNSS/QSIG converter?

Thanks a lot!

!!! Trace: !!!


Mar 31 11:42:48.136: ISDN Se0/0/0:15 Q931: RX <- SETUP pd = 8 callref = 0x3829

Sending Complete

Bearer Capability i = 0xA880

Standard = ISO/IEC

Transfer Capability = Unrestricted Digital

Transfer Mode = Circuit

Transfer Rate = Packet - not specified

Channel ID i = 0xAC

Facility i = 0x9FAA068001008201008B0101A1240201D10201123080A50D0A0103120


Calling Party Number i = 0x4980, '73222962'

Plan:Private, Type:Subscriber(local)

Called Party Number i = 0xC9, '4890'

Plan:Private, Type:Subscriber(local)

Shift to Codeset 4

Codeset 4 IE 0x31 i = 0x80

Shift to Codeset 5

Codeset 5 IE 0x32 i = 0x81

Mar 31 11:42:48.148: ISDN Se0/0/0:15 Q931: TX -> CALL_PROC pd = 8 callref = 0xB


Channel ID i = 0xAC

Mar 31 11:42:48.148: ISDN Se0/0/0:15 Q931: TX -> RELEASE pd = 8 callref = 0xB82


Cause i = 0x809F - Normal, unspecified

Mar 31 11:42:48.172: ISDN Se0/0/0:15 Q931: RX <- RELEASE_COMP pd = 8 callref =



  • 1
  • 2
  • 3
  • 4
  • 5
Overall Rating: 0 (0 ratings)
msolak Sat, 03/31/2007 - 07:04
User Badges:
  • Silver, 250 points or more


can you find out, why the pbx is sending the bearer cap. "Unrestricted Digital" information in the setup?

can you see this message also for a normal call from the pbx?

can you post your gateway config?



Alexander.Khlem... Thu, 04/05/2007 - 07:40
User Badges:


ISDX engineer could not answer your questions strait away - he probably did not understand them or did not want to understand them. But he has forwarded a piece of his trace of this failed transfer. Here it is:

acknowledgement from ISDX < V01937 CRM/CIM 048;

disconnect from Cisco > V01937 CRM/CIM 048;

sub part of call (last digit) < V01937 SSRM(I) 0

start of call V=Virtual < V01937 ISRM(I) 10;*1#*50*73222962#*18*31*31*31#*19*O#*30B#489

call set up starting with a *30B which is DIV-V Diversion-Validation


This Discussion