07-14-2015 05:31 AM - edited 03-17-2019 03:38 AM
Hi,
I have a very weird thing
CME 2811 with a PRI line. When the CME is called from a mobile or land line (within the country) everything works fine.
When the originator is from abroad the call is not successful. What I see is that when a call is coming from abroad, the ISDN message TX -> ALERTING is missing.
Example from a land line within the country calling the customer:
Jul 14 14:55:20.345: ISDN Se0/3/0:15 Q931: RX <- SETUP pd = 8 callref = 0x000F
Sending Complete
Bearer Capability i = 0x8090A3
Standard = CCITT
Transfer Capability = Speech
Transfer Mode = Circuit
Transfer Rate = 64 kbit/s
Channel ID i = 0xA98386
Exclusive, Channel 6
Calling Party Number i = 0x0180, '*** Land Line number ****'
Plan:ISDN, Type:Unknown
Called Party Number i = 0x81, '*** Customer number ***'
Plan:ISDN, Type:Unknown
Jul 14 14:55:20.381: ISDN Se0/3/0:15 Q931: TX -> CALL_PROC pd = 8 callref = 0x800F
Channel ID i = 0xA98386
Exclusive, Channel 6
Jul 14 14:55:20.393: ISDN Se0/3/0:15 Q931: TX -> ALERTING pd = 8 callref = 0x800F
Progress Ind i = 0x8188 - In-band info or appropriate now available
Jul 14 14:55:24.701: ISDN Se0/3/0:15 Q931: TX -> CONNECT pd = 8 callref = 0x800F
Jul 14 14:55:24.705: ISDN Se0/3/0:15 Q931: RX <- CONNECT_ACK pd = 8 callref = 0x000F
Example from a international number calling the customer:
Jul 14 14:48:34.800: ISDN Se0/3/0:15 Q931: RX <- SETUP pd = 8 callref = 0x000B
Sending Complete
Bearer Capability i = 0x8090A3
Standard = CCITT
Transfer Capability = Speech
Transfer Mode = Circuit
Transfer Rate = 64 kbit/s
Channel ID i = 0xA98384
Exclusive, Channel 4
Calling Party Number i = 0x0180, '*** International Number ***'
Plan:ISDN, Type:Unknown
Called Party Number i = 0x81, '*** Customer number ***'
Plan:ISDN, Type:Unknown
Jul 14 14:48:34.820: ISDN Se0/3/0:15 Q931: TX -> CALL_PROC pd = 8 callref = 0x800B
Channel ID i = 0xA98384
Exclusive, Channel 4
Jul 14 14:48:34.820: ISDN Se0/3/0:15 Q931: TX -> CONNECT pd = 8 callref = 0x800B
Jul 14 14:48:34.828: ISDN Se0/3/0:15 Q931: RX <- CONNECT_ACK pd = 8 callref = 0x000B
The ISDN message are going from TX->CALL_PROC directly to TX->CONNECT, skips the TX -> ALERTING
Behind this is a provider with a SIP trunk, and they say because of this they miss the SIP 180 RINGING, and call fails.
I have never seen this, any idea?
JH
07-14-2015 09:34 AM
What is the IOS version? secondly alerting are optional without this call be setup, Yes certainly with alerting message you will see this behavior and corresponding inter-operability message would missed that.
can you please provide us the exact call-flow. assuming this is incoming call
Users-----PSTN-------PRI------GW--SIP--CUCM----Phone
Br,
nadeem
07-14-2015 11:52 AM
Hello Nadeem,
The configuration is like this:
Provider-----E1 PRI--------CME
For the CME there is only a PRI, and SCCP phones. This configuration has worked for at least 7 years with another provider.
IOS version: c2800nm-ipvoicek9-mz.124-15.T7.bin
Only when the CME receives a call from abroad, the CME doesn't send back an ALERTING
Thanks
Jan
07-14-2015 12:42 PM
Hi,
This is strange behavior for me as well. Try to configure the global command "voice call send-alert" and the command "progress_ind alert enable 8" under your pots dialpeer.
07-14-2015 02:17 PM
Hi Jan,
I have always had some tweaking required with various International Callers / International Calling.
I would request you to try changing the Incoming Calls with International (calling number) to
Plan:Unknown, Type:Unknown
HTH
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