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

[Lelio Fulgenzi]

This probably isn't of much help/use, but I'm pretty sure this is similar to what paging solutions do. Essentially, they start a multi-cast stream, subscribe all the phones to it, start playing the multi-cast stream, then they unsubscribe the phones from the stream, then stop the stream (or something like that). 

If your source can use the same multi-cast IP address, then it shouldn't be difficult (not that I could do it) to use the SDK below to allow a user to subscribe to that stream using a button. 

Just throwing that out there. 

--- 
Lelio Fulgenzi, B.A. 
Senior Analyst (CCS) * University of Guelph * Guelph, Ontario N1G 2W1 
(519) 824-4120 x56354 (519) 767-1060 FAX (ANNU) 
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ 
Cooking with unix is easy. You just sed it and forget it. 
- LFJ (with apologies to Mr. Popeil) 


----- Original Message -----
From: "Tim Reimers" <treimers at ashevillenc.gov> 
To: cisco-voip at puck.nether.net 
Sent: Tuesday, April 24, 2012 4:17:07 PM 
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) 

	

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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