Comments on: SIP Android - a sneak screencast

By: Earlence

Earlence — Sun, 28 Dec 2008 07:24:50 +0000

Hi,
I am a student intern with Cornerstone Inc, We are doing development related to Android.
I am trying to build a small app that can establish VoIP calls. Can u please guide me on where to start.
Looking forward to a reply.
(ps :- I will be using the implementation your company has released)

Cheers,
Earlence Fernandes

By: Jyothsna

Jyothsna — Thu, 24 Apr 2008 00:54:43 +0000

Thanks Arjun,

That helps my understanding.

–Jyothsna

By: Arjun

Arjun — Wed, 23 Apr 2008 15:42:56 +0000

That is correct. SIP is separate from RTP. SIP sets up the signaling after which RTP flows to/from ports provided in the SDP of SIP. So with a pure SIP stack only, you cannot hear/talk, you only get to see session establishment.

Once RTP is integrated, then voice will also work (along with whichever codec you choose).

By: Jyothsna

Jyothsna — Fri, 18 Apr 2008 16:57:17 +0000

You said you have not yet implemented the RTP stack for communicating voice.

So, as I see from the wireshark capture, there are no RTP messages to and from from Nitin and your UA.

What my question is..were you able to talk and listen to Nitin with your SIP stack even without RTP stack. I am a student, so, I dont know much details..Still learning.

If you were just able to establish sessions, is it expected that once RTP stack is also implemented we can exchange voice messages or can we use straight UDP for that.

Thanks,
Jyothsna

By: We have SIP working on android! « iConverged

We have SIP working on android! « iConverged — Tue, 18 Mar 2008 02:55:13 +0000

[...] here for a screencast [...]