How do you decipher facility codes on Q931 traces

littledavewhite · ‎07-17-2007

I have an issue on site with divert messages across a qsig link. The customer is diverting calls from an sx2000 pabx to callmanager via a MGCP gateway. I need to understand the facility codes and how to decipher them ?

gogasca · ‎07-17-2007

http://www.linkbit.com/support-decoder.html

littledavewhite · ‎07-17-2007

hi in my debug isdn q931 i have the following message, what do i paste into the decode tool

Facility i = 0x9FAA068001008201008B0100A1190202017B06052B0C024E01300C8004303030300A0102040144

gogasca · ‎07-17-2007

Hi,

Could you please paste the whole debug isdn q931. This encoder looks like is not recognizing:

9F AA 06 80 01 00 82 01 00 8B 01 00 A1 19 02 02 01 7B 06 05 2B 0C 02 4E 01 30 0C 80 04 30 30 30 30 0A 01 02 04 01 44

littledavewhite · ‎07-17-2007

hi the full decode

*Jul 17 15:13:56.102: ISDN Se0/0/0:15 Q931: RX <- SETUP pd = 8 callref = 0x00B6

Sending Complete

Bearer Capability i = 0x8090A3

Standard = CCITT

Transer Capability = Speech

Transfer Mode = Circuit

Transfer Rate = 64 kbit/s

Channel ID i = 0xA98381

Exclusive, Channel 1

Facility i = 0x9FAA068001008201008B0100A1100202018B020100300780055350415245

Facility i = 0x9FAA068001008201008B0100A1190202018C06052B0C024E01300C8004303030300A010204014A

Calling Party Number i = 0x4980, '3769'

Plan:Private, Type:Subscriber(local)

Called Party Number i = 0x80, '2399'

Plan:Unknown, Type:Unknown

*Jul 17 15:13:56.118: ISDN Se0/0/0:15 Q931: TX -> CALL_PROC pd = 8 callref = 0x80B6

Channel ID i = 0xA98381

Exclusive, Channel 1

*Jul 17 15:13:56.122: ISDN Se0/0/0:15 Q931: TX -> ALERTING pd = 8 callref = 0x80B6

Progress Ind i = 0x8088 - In-band info or appropriate now available

*Jul 17 15:13:56.246: ISDN Se0/0/0:15 Q931: TX -> CONNECT pd = 8 callref = 0x80B6

Facility i = 0x9FAA06800100820100A1110201020201028009566F6963656D61696C

Connected Number i = 0x0081, '2399'

*Jul 17 15:13:56.262: ISDN Se0/0/0:15 Q931: RX <- CONNECT_ACK pd = 8 callref = 0x00B6

*Jul 17 15:14:08.734: ISDN Se0/0/0:15 Q931: RX <- DISCONNECT pd = 8 callref = 0x00B6

Cause i = 0x8090 - Normal call clearing

*Jul 17 15:14:08.778: ISDN Se0/0/0:15 Q931: TX -> RELEASE pd = 8 callref = 0x80B6

*Jul 17 15:14:08.790: ISDN Se0/0/0:15 Q931: RX <- RELEASE_COMP pd = 8 callref = 0x00B6

mchandak · ‎07-17-2007

I've attached the decode of the Setup and Connect message.

Hope this helps

littledavewhite · ‎07-18-2007

hi this is very good but i was looking for some information on the decode for future ref, did you manage to get the decode tool working?