[cisco-voip] Streaming multicast audio source to an IP phone

[John Franklin]

Tim, we have implemented this very solution for a public utility which wanted to multicast the board meetings for employees. For the connectivity we used an E&M voice port in a router (no loop or ground start required for E&M) and connected this directly to the audio source from the room audio system. The router configuration was a PLAR configuration on the voice port and a dial-peer which set the destination to be a multicast address. Then there is no need for any 3rd party software or additional cost. Then with a simple one page IP Phone service the employees could listen via a the IP phone or with VLC on the PC.

Let me know if you want I could probably dig up the exact configuration we used on the router.

Regards,

John Franklin  | john.franklin at voipintegration.com
VoIP Integration | www.VoIPintegration.com<http://www.voipintegration.com/>
201K Sand Creek Road Brentwood, CA, USA. 94513
Tel: +1-925-513-4400
Fax: +1-925-513-4401

From: cisco-voip-bounces at puck.nether.net [mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of Tim Reimers
Sent: Tuesday, April 24, 2012 1:17 PM
To: cisco-voip at puck.nether.net
Subject: [cisco-voip] Streaming multicast audio source to an IP phone

Hi everyone-

I'm researching how to possibly do something with IP phones and multicast-

We want to stream audio from meetings in a very plug-and-play user-friendly way,
to IP phones and also PCs on the network.

I will be locating some type of hardware that can be connected to the line out of an audio system to pick up the audio, and provide a
multicast stream.
The multicast stream will NOT be coming from an IP phone -
It will be something like a PC with VLC loaded on it, or with proof of concept to get some funding, I might use a VBrick or something like that.

We want it to be a black box that a non-technical user can just switch on along with the audio system for the meeting room, and streaming
will automatically begin.

On the receive side, we want users to be able to listen to the stream on an IP phone or a PC, without having to
do much more than select a service or dial a number on the system, or click a link with a PC.

This is a one-way listen to the meeting; there is no need or requirement for audio from the client side, so the IP Phone should automatically go into speakerphone mode with mute, or allow audio to handset/headset

I have seen the below from the IP Phone SDK - I don't know if I could leverage that into a service that is
pre-programmed to join a multicast "conference" (aka audio stream, for my purposes)
on a known multicast IP.

Thanks for any advice you guys have!

I know sometimes I forget to come back in here and thank you for times you give me great assistance-
Along those lines, major thanks to Peter Snow and others who assisted me with
echo cancelling questions and PRI setup!

14. MConference (JSP)
[cid:image003.gif at 01CD224D.67F83B80]

MConference is a sample application which allows users to create, join, and control IP multicast conferences
from an XML phone service. It's a good example of the power of XML services and IP multicast - providing a large-scale (thousands of participants), arbitrated conference using a simple web application.
Conference arbitration can be enabled/disabled by the conference owner. When arbitration is enabled participants must request permission which is then granted by the conference owner. When conference arbitration is disabled, participants can simply push-to-talk, similar to a hoot-and-holler network.






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