[cisco-voip] Calls not completing to some mobile prefixes

[kevin gannon]

I had thought the callmanager was dropping the call.
But asking more pointed questions of the user they
were hearing a funny tone and replacing the handset.

The carrier said we should recieve ALERTING within
5seconds and that is why I thought of timers. The user
was hanging up before the 5 seconds.

I have asked them to go back with a longer debug to the carrier.

Thanks would never have thought of it !

Regards
Kevin
On Tue, Mar 18, 2008 at 1:22 PM, Ryan Ratliff <rratliff at cisco.com> wrote:
> Mar 18 10:56:52.538 GMT: ISDN Se4/1:15 Q931: RX <- PROGRESS pd = 8
>  callref = 0x80B2
>         Progress Ind i = 0x8088 - In-band info or appropriate now available
>
>  Mar 18 10:56:55.930 GMT: ISDN Se4/1:15 Q931: TX -> DISCONNECT pd = 8
>  callref = 0x00B2
>         Cause i = 0x8090 - Normal call clearing
>
>  Upon receipt of the Progress message audio should have been cut
>  through to your user so they could hear ringback.  The TX ->
>  Disconnect means CUCM initiated the disconnect and Normal call
>  clearing indicates it was because the caller hung up the phone.
>
>  At this point I'd ask the user what they heard that caused them to
>  hang up the phone?
>
>  -Ryan
>
>
>
>  On Mar 18, 2008, at 9:19 AM, kevin gannon wrote:
>
>  We have a E1 trunk to a mobile carrier for cheaper calls. Some blocks
>  of numbers will not complete/connect. However if we ring the number
>  via a trunk to another carrier it works fine.
>
>  My hunch is we are disconnecting because we are not getting ALERTING
>  back quickly enough. However looking at the T timers I can not see one
>  that might be causing the issue. Looking for suggestions/ideas ?
>
>  It is callmanager 6 and it is an IOS gateway being controlled by MGCP.
>
>  ########################Working Call################################
>  #debug isdn
>  Mar 18 10:57:24.250 GMT: ISDN Se4/1:15 Q931: TX -> SETUP pd = 8
>  callref = 0x00B3
>         Bearer Capability i = 0x8090A3
>                 Standard = CCITT
>                 Transfer Capability = Speech
>                 Transfer Mode = Circuit
>                 Transfer Rate = 64 kbit/s
>         Channel ID i = 0xA9839C
>                 Exclusive, Channel 28
>         Calling Party Number i = 0x0181, '6554'
>                 Plan:ISDN, Type:Unknown
>         Called Party Number i = 0x80, '0xxxxxx'
>                 Plan:Unknown, Type:Unknown
>
>  Mar 18 10:57:24.434 GMT: ISDN Se4/1:15 Q931: RX <- CALL_PROC pd = 8
>  callref = 0x80B3
>         Channel ID i = 0xA9839C
>                 Exclusive, Channel 28
>
>  Mar 18 10:57:24.438 GMT: ISDN Se4/1:15 Q931: RX <- PROGRESS pd = 8
>  callref = 0x80B3
>         Progress Ind i = 0x8088 - In-band info or appropriate now available
>
>  Mar 18 10:57:28.482 GMT: ISDN Se4/1:15 Q931: ALERTING pd = 8  callref
>  = 0x80B3
>
>  Mar 18 10:57:44.335 GMT: ISDN Se4/1:15 Q931: CONNECT pd = 8  callref
>  = 0x80B3
>
>
>  Mar 18 10:57:45.835 GMT: ISDN Se4/1:15 Q931: RELEASE pd = 8  callref
>  = 0x80B3
>
>
>
>
>
>  #############################Failed call:##############################
>
>
>  Mar 18 10:56:52.382 GMT: ISDN Se4/1:15 Q931: TX -> SETUP pd = 8
>  callref = 0x00B2
>         Sending Complete
>         Bearer Capability i = 0x8090A3
>                 Standard = CCITT
>                 Transfer Capability = Speech
>                 Transfer Mode = Circuit
>                 Transfer Rate = 64 kbit/s
>         Channel ID i = 0xA9839C
>                 Exclusive, Channel 28
>         Calling Party Number i = 0x0181, '8343'
>                 Plan:ISDN, Type:Unknown
>         Called Party Number i = 0x80, '0xxxxxx'
>                 Plan:Unknown, Type:Unknown
>
>  Mar 18 10:56:52.534 GMT: ISDN Se4/1:15 Q931: RX <- CALL_PROC pd = 8
>  callref = 0x80B2
>         Channel ID i = 0xA9839C
>                 Exclusive, Channel 28
>
>  Mar 18 10:56:52.538 GMT: ISDN Se4/1:15 Q931: RX <- PROGRESS pd = 8
>  callref = 0x80B2
>         Progress Ind i = 0x8088 - In-band info or appropriate now available
>
>  Mar 18 10:56:55.930 GMT: ISDN Se4/1:15 Q931: TX -> DISCONNECT pd = 8
>  callref = 0x00B2
>         Cause i = 0x8090 - Normal call clearing
>
>  Mar 18 10:56:56.234 GMT: ISDN Se4/1:15 Q931: RX <- RELEASE pd = 8
>  callref = 0x80B2
>  Mar 18 10:56:56.246 GMT: ISDN Se4/1:15 Q931: TX -> RELEASE_COMP pd = 8
>   callref = 0x00B2
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