Asterisk and MPE

The full tutorial for Asterisk and Processing is available here:

http://www.shiffman.net/p5/asterisk

However, there a few things specific to our class and itp's server.

Working on the server

First of all, the server is:

asterisk.itp.tsoa.nyu.edu

To use the server, you'll need to get an account. E-mail me with your netid if you want an account.

Once you have an account, you'll need to login into the server by ssh'ing into it:

ssh netid@asterisk.itp.tsoa.nyu.edu

On the server, you'll have several folders:

/asterisk_conf/ --> this is where you configure your NETID_extensions.conf file

I also suggest that you create a "java" folder and put all of your classes in there (with the server files in a server folder) To compile on the server, you need to reference the path to java.

/usr/java/jdk1.5.0_10/bin/javac server/JEAGIServer.java

To run the server:

/usr/java/jdk1.5.0_10/bin/java server.JEAGIServer

To run the server in the background (so you can quit terminal, but have it continue to work):

nohup /usr/java/jdk1.5.0_10/bin/java server.JEAGIServer &

Then to quit the server later, you must find the process id:

ps -ef | grep java

and kill it:

kill #####

Softphone

To test, you'll want to use a softphone (calling from your cell over and over is a pain). I use <a href="http://www.gizmoproject.com/">Gizmo</a>. Download and install Gizmo and configure it to use Asterisk. You'll need to make a file called netid_sip.conf and put that in your asterisk_conf folder. That file should look like this:

[dts204_gizmo] type=friend username=netid_gizmo secret=netid_gizmo host=dynamic dtmfmode=rfc2833 allowguest=yes insecure=very promiscredir=yes context=dts204_default

Your secret password is not secure so don't use anything private! Then, set up Gizmo to login into a "secondary" account.

Server: asterisk.itp.tsoa.nyu.edu Account: netid_gizmo password: netid_gizmoe

More info on soft phones from shawn's page: https://www.itp.nyu.edu/~sve204/redial_fall07/week3.html

Using this with MPE

Two main issues:

1. Processing's Client class has the same name as my MPE Client class. Oooops!!! To get around this, you have to refer to them by their full path:

	processing.net.Client netClient; 
	mpe.client.Client client;

	netClient = new processing.net.Client(this,"asterisk.itp.tsoa.nyu.edu", 9001);

2. When you read the info in, you've got to broadcast it right back out!

		// If there is information available to read from the Server 
		if (ID == 0 && netClient.available() > 0) { 

			String msg = netClient.readString();   // Read it as a String 
			client.broadcast(msg);
		}

You should only have one client get the phone call!

Then you can do the parsing in frameEvent()


	public void frameEvent(mpe.client.Client c){

		if (c.messageAvailable()) {
			String[] msg = c.getDataMessage();
			String[] tokens = msg[0].trim().split(",");
			if (tokens.length > 1) {
				if (!calls.containsKey(tokens[0])) {
					Call call = new Call(this,client,tokens[0],random(width),random(height));
					calls.put(call.id,call);
				} 
				else if (tokens[1].equals("hangup")) {
					calls.remove(tokens[0]);
				} 
				else {
					Call call = (Call) calls.get(tokens[0]);
					if (call != null) {
						call.command(tokens[1]);
					}
				}
			}		
		}
		redraw();
	}

The example is on the CVS:

/home/dts204/bigscreens/examples/Asterisk