Re: [Opalvoip-devel] Q.931 Progress Indicator

[Robert J. <ro...@vo...>]

It is left up to the application for what happens when the remote side is
"ringing", that is Alerting. It is difficult for the library to know what
the application wants to do there.

The only exception to this is the OpalLineConnection, where it is assumed
that a dumb POTS phone is attached, so that class does generate a local
ringback tone to be played down the line to the handset.

I suppose you could consider adding a similar piece of functionality to
OpalPCSSConnection, if that is fact what you are using. I can probably give
you some pointers on how to do so.

 
Robert Jongbloed
OPAL/OpenH323/PTLib Architect and Co-founder.


> -----Original Message-----
> From: dca...@ma... [mailto:dca...@ma...]
> Sent: Friday, 26 March 2010 6:37 AM
> To: opa...@li...
> Subject: [Opalvoip-devel] Q.931 Progress Indicator
> 
> I am using a Cisco 3745 with IOS Version 12.4(11)T4 with latest opal, but
we
> have a small problem when there is no Progress-Indicator present in the
Q.931
> field. Without a progress-indicator, we get no ringback tone, and we can't
> force the 3745 to provide a ringback tone only when PI is missing (it
would
> always generate a local RBT, overriding any PI settings in Q.931).
> 
> Is there a way to have opal play a local ringback tone (like a .wav or
.mp3),
> when the Q.931 field of Alerting OLC PDU comes back without a Progress-
> Indicator?
> 
> Heres an example without PI in Q.931
> 2010/03/25 19:21:30.936	 46:21.841	      H225 Caller:24476
> 	02AF5768	     h323pdu.cxx(80)	H225	Receiving PDU:
>   {
>     q931pdu = {
>       protocolDiscriminator = 8
>       callReference = 433
>       from = destination
>       messageType = Alerting
>       IE: Display = {
>         66 61 6b 65 5f 44 69 73  70 6c 61 79               fake_Display
>       }
>       IE: Signal = {
>         01                                                 .
>       }
>       IE: User-User = {
>         23 80 06 00 08 91 4a 00  04 28 c0 b5 00 00 12 0b
#.....J..(......
>         43 69 73 63 6f 47 61 74  65 77 61 79 00 32 40 02
CiscoGateway.2@.
>         ...
>       }
>     }
> 
> With PI (the far end provides the ringback tone):
> 2010/03/25 19:24:38.835	 49:29.748	      H225 Caller:23196
> 	022B2EF0	     h323pdu.cxx(80)	H225	Receiving PDU:
>   {
>     q931pdu = {
>       protocolDiscriminator = 8
>       callReference = 434
>       from = destination
>       messageType = Alerting
>       IE: Progress-Indicator = {
>         80 81                                              ..
>       }
>       IE: Display = {
>         66 61 6b 65 5f 44 69 73  70 6c 61 79               fake_Display
>       }
>       IE: Signal = {
>         01                                                 .
>       }
>       IE: User-User = {
>         23 80 06 00 08 91 4a 00  04 28 c0 b5 00 00 12 0b
#.....J..(......
>         43 69 73 63 6f 47 61 74  65 77 61 79 00 32 40 02
CiscoGateway.2@.
>         ...
>       }
>     }
> 
> 
> --
> Regards,
>  -Demetrius Cassidy
> 
>
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