01-24-2012 01:06 AM - edited 03-19-2019 04:17 AM
Hi,
I have a cluster of call manager version 7.1(5) and 1 MGCP voice gateways with a 1 PRI to call the PSTN . the PRI worked fine in incaming calls case
but in outgoing calls not work
Note: 1- the voice gateway registed on call manager
2-Please find below the debuge ISDN q931 when i need to establesh call with PSTN :
*Jan 24 09:01:32.600: ISDN Se0/2/0:15 Q931: TX -> SETUP pd = 8 callref = 0x0003
Sending Complete
Bearer Capability i = 0x8090A3
Standard = CCITT
Transfer Capability = Speech
Transfer Mode = Circuit
Transfer Rate = 64 kbit/s
Channel ID i = 0xA9839F
Exclusive, Channel 31
Calling Party Number i = 0x0081, '2222'
Plan:Unknown, Type:Unknown
Called Party Number i = 0x80, '01064861110'
Plan:Unknown, Type:Unknown
*Jan 24 09:01:32.624: ISDN Se0/2/0:15 Q931: RX <- RELEASE_COMP pd = 8 callref =
0x8003
Cause i = 0x8286 - Channel unacceptable
01-24-2012 01:30 AM
hi,
For the outbound calls that fails it uses "Exclusive, Channel 31"
see below for Q931 disconnect information:
http://www.cisco.com/en/US/tech/tk801/tk379/technologies_tech_note09186a008012e95f.shtml
86 Channel unacceptable
The service quality of the specified channel is insufficient to accept the connection. The
call attempt fails because the channel is unusable.
check your callmanager config and see how many channels your telco provides.
Can you change the order in which the B-channels is selected to see if this makes any
difference
Hope this helps!
Thanks,
Karthik
01-24-2012 03:04 AM
many thanks for your reply
i changed
but the problem still existed
01-24-2012 08:43 AM
hi Wahid,
Can you check with Telco as to why they think the channel is unacceptable to
them? Ask them to check whether the channels on their side are active and
not busied out. By default, the User side of the PRI starts allocating
channels from 31 and goes to 1 as simultaneous calls come in.
I asked you to change the channel selection order now you see this issue
even on channel 1.
Jan 24 09:01:32.624: ISDN Se0/2/0:15 Q931: RX <- RELEASE_COMP pd = 8 callref =
0x8003
Cause i = 0x8286 - Channel unacceptable
The call is constantly being released by your telco.
Hope this helps!
Thanks,
Karthik
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