Some clarification from a quick inspection of the code: The callback function can be a generic function and possibly be used by other functions that specify a callbackfunction: it can also capture "events". So callbackfunction can be called with two different types: "dtmf" or "events". collectInput will result calling your callbackfunction with type="dtmf". Checking for "digits" is indeed useless ... Note that the last argument(s) of collectInput are optional. What is that second argument? It should be: "an object dtmf which turns as arg parameter in callback function." (I'm guessing a bit here, because I don't know javascript or mod_spidermonkey, and don't know about the quotes and I didn't try it out and I did only a quick inspection of the code). Garmt -----Original Message----- From: freeswitch-users-bounces@lists.freeswitch.org [mailto:freeswitch-users-bounces@lists.freeswitch.org] On Behalf Of Kamen Sent: Sunday, 29 May, 2011 17:39 To: freeswitch-users@lists.freeswitch.org Subject: Re: [Freeswitch-users] collectInput does not call callback function Good point grmt! But that is where I am getting confused. What is that second argument? According to collectInput description in wiki ( http://wiki.freeswitch.org/wiki/Session_collectInput http://wiki.freeswitch.org/wiki/Session_collectInput ) it is a "callbackArguments" which in the example given is the last argument (is it? because no more explanation is given): function mycb( session, type, data, arg ) So I take that "dtmf" of the collectInput is arg of the callback function. session.collectInput( mycb, "dtmf", 3000, 0) But why is it a string type in the example? Isn't dtmf defined as an object and then used in callback function as an object? arg.digits += data.digit; At the same time in callback function example type parameter is apparently expected to be a string "dtmf". Is it a coincidence or I am missing something here? If collectInput second parameter is string "dtmf" then it also looks that in callback function it is apparently a second parameter (type). So what is it? Is it an object dtmf which turns as arg parameter in callback function, or it is a string which in callback function turns into type parameter? I took it should be a string turning into "type" of callback function, so it does not matter what string is as long as it is the same. So I made it "digit". If I am missing something here, I'd really appreciate if someone let me know. I also tried it to be just an object (without quotes, in spite of the example), or followed the example exactly. In any case the callback is not happening - the first line of my callback function is a console prompt, which is not printed. Thus is my question. Regards, Sergei Kamen -- View this message in context: http://freeswitch-users.2379917.n2.nabble.com/collectInput-does-not-call-cal lback-function-tp6414679p6416704.html Sent from the freeswitch-users mailing list archive at Nabble.com. _______________________________________________ FreeSWITCH-users mailing list FreeSWITCH-users@lists.freeswitch.org http://lists.freeswitch.org/mailman/listinfo/freeswitch-users UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-users http://www.freeswitch.org