[Asterisk-Users] Starting RTP with Dial and MusicOnHold

[Pedro Nunes]

Hello,

Do you try

Answer() and then Dial(SIP/xyz,,m)???

Exten => ???,1,Answer()
Exten => ???,2,Dial(SIP/xyz,,m)

You need to answer the call before you can hear music on hold.

Pedro Nunes

-----Original Message-----
From: asterisk-users-bounces at lists.digium.com
[mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of Aaron
Clauson
Sent: quinta-feira, 15 de Dezembro de 2005 4:45
To: 'Asterisk Users Mailing List - Non-Commercial Discussion'
Subject: [Asterisk-Users] Starting RTP with Dial and MusicOnHold

Hi,

I'm trying to get Asterisk working with a supplier's Cerpack switch and
everything is working except audio ringback for calls coming from
Cerpack to
Asterisk.

The Cerpack switch only does out of band progress indication (seems a
bit
strange for SIP to SIP calls?!) so I've spent the last two days trying
to
find a way to force Asterisk to send an RTP stream to Cerpack for ring
back.

Theoretically the Dial command with the m option looks to be exactly
what I
need:

Dial(SIP/xyz,,m)

This should play musiconhold back to the caller and in my case I just
took a
recording of the PSTN tones I wanted to play and created a musiconhold
class
for them. The command will work correctly when dialled from a SIP phone
connected to Asterisk but not for calls coming from Cerpack. As far as I
can
tell this is because Asterisk won't initiate the RTP stream and waits
for a
packet from the client before starting to play the musiconhold, perhaps
assuming the connection is not available until it gets a packet. In this
case Cerpack isn't sending a packet so no audio is heard until the call
is
answered.

Has anybody seen anything like this before?

Thanks,

Aaron


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