need softphone for voip - sip calls with audio file playback and web integration

I am looking for a softphone that will work with our web based call center CRM. We are making outbound calls only and it need to have the ability for a user to click a button or something on the phone and for it to play a pre-recorded file. Even better would be a dropdown list of more that one file that can be selected. (We may need other records for different calling campaigns) This will be used in cases where the call center agent is transfered to someone's voice mail in the process of the call and they need to leave a voice mail message they we pre-record of all of them.

We have used a softphone in the pass that would dial out on page load a new contact using the following client side JavaScript when passed a 10 digit phone number. What is missing is the file playback.

To sum up it needs
1. web browser integration
2. the ablity to play a pre-recorded file over phone line on some kind of button click. File format does not matter (mp3 or wav)
3. Very easy to use.
4. Works with Asterisk phone system

function SipDial(phone){
    PhoneVar = 'sip:1' + phone;,'Dial');

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Andres PeralesCommented:

Have you looked into Microsoft Office Communications Server, and it's VoIP capabilities?
marms676Author Commented:
No, we are not looking for a voip server. We are just looking for a softphone as detailed in my question.
try, I think they may have something you can use.

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marms676Author Commented:

The only softphone this company has is this:
It comes close in that it has a feature that:
--Place callers on hold
--Basic on-hold music included

I can see rigging it up to where the hold music is the voice mail recording we want to leave, but the problem would be that we need some kind of way that the use knows that the message has completed and hangs up.

I bit more information on my question is that we are trying to replace this product we currently use

It uses a USB modem to dial the number which requires a POT's line and we are moving to voip, but it has the leave recorded message feature that we need. It does have a skype option, but is not a SIP dialer.

Anyone else with ideas or softphone applications they have used?

marms676Author Commented:
I figured I could use a softphone similar to these in a different way to get the recording.
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