Sending application-specific data from one SIP client to another during calls

1
votes

I would like to send custom / app-specific data from one custom SIP client to another during calls. Instead of maintaining a separate connection to a separate server application, can this be done using Asterisk? It looks like there are 2 ways to do this:

  • Using SIP INFO command.
  • By initiating a custom RTP connection for this custom data to be sent over, using credentials from SIP.

My questions are:

  1. Can Asterisk pass any SIP INFO messages / custom RTP streams coming to one client to another? How about in ConfBridge conferences?
  2. How do I capture / stream this data using hooks provided by Asterisk in a separate server application (e.g. using AMI)?
1
sipasterisk

1 Answers

0
votes

Yes, you can use for example video codec for send non-video stream. Asterisk will not check any way that stream before sending other party.

Yes, you can use SIP message functional to send text data

http://www.voip-info.org/wiki/view/Asterisk+cmd+MessageSend

http://www.voip-info.org/wiki/view/Asterisk+func+message

I am afraid conference will not allow do same, you have create your own app for that.

Also it seams you have use Kamailio/Opensips project for that, it allow more flexibility for sip message proxy/much more perfomance.