[asterisk-biz] Does callprogress work with DSS1 (EURO-ISDN) for playing early media announcements?

[Sabine Jordan]

Hello Trixter,

I have also talked to the carrier and they confirmed that early media
feature is enabled and that I would have 90 seconds for playing early
media announcements. I've sent them my full isdn trace and they've told
me that I do send progress information and even the correct progress
indicator, but - as I've already mentioned - the progress information
that I send is in the wrong message type. It's in PROGRESS and they
expect it to be sent in either ISDN message-type "Setup",
"Callproceeding" or "Alerting". Sorry,I can't get it more clearly...
Even Sangoma has told me that it may be a problem with libpri, zaptel or
asterisk.

Greetings Sabine.


Trixter aka Bret McDanel schrieb:
> On Thu, 2008-09-25 at 13:59 +0200, Sabine Jordan wrote:
>> Hello,
>>
>> we use Sangoma Technologies Corp. A104X hardware and asterisk with DSS1
>> (EURO-ISDN). We would like to use early media, because we have to play a
>> free announcement to inform the customers about the charges.
>> Unfortunately we get a hangup with Release Cause 102 after about 15
>> seconds of the announcement...
>>
> 
> that may be the carrier, Meteor (IE GSM provider) gives you 60 seconds
> when you place a call, some carriers limit it on inbound to prevent
> abuse.  Many carriers also filter one direction of the media flow (ie
> Meteor would not let me send voice/dtmf from my phone but I could
> listen) to prevent someone from running a "tollfree" on what should
> otherwise not be a tollfree by doing the entire call in early media
> mode.
> 
> So you may want to find out if its the drivers/implementation or if its
> the carrier that is capping the time limit.  I would ask the carrier and
> explain why you need it to be the way it is.  By the time you get a
> response from them something may have come in on the list that would
> more clearly state which way it is, so you can be better prepared to
> deal with whatever it is.