[asterisk-users] Can not hear the telco System Announcement

[Jean-Michel Hiver]

stoffell a écrit :

> On 9/1/06, Xue Liangliang <xueliangliang at gmail.com> wrote:
>
>> Hi, all. I am from Singapore, we deployed a few PABX based on Asterisk.
>> Here in Singapore there are two Teleco providing E1 pri service, we
>> encountered a strange problem : when calling a number that is
>> unavailible or line suspended,  one of the E1 provider keep the call
>> ongoing, because there are system announcement like "The line currently
>
>
> I have something similar on a european E1. I do think this has
> something to do with the PBX.. (asterisk in this case)
>
> I have the same 'issue' on a BRI (ISDN) interface. The 'old' PBX (a
> classic PBX) did sent out the telco announcement.
>
> I have tried changing priindication, but this didn't help. I can see
> the hangup_cause and can play prompts according to the hangup_cause,
> but I would prefer using the telco announcement.

Have you tried progressinband=yes? As far as understand it, it forwards 
early RTP (that is, stuff that is received prior to the ANSWER), which 
might just do the trick.

I had this working when interconnecting with Chile mobile. When somebody 
is on the line, they have some music and a message in spanish! Needless 
to say, with g729 the music part sounds pretty awful (in fact it already 
sounds awful with g711 anyway...)

NB: As far as I can tell, progressinband=yes isn't supported in 
chan_h323, which is a shame :(

Cheers,
Jean-Michel.