Does it have to be a “dial in to listen live” situation? I did my practicum in a Call Centre, and we had calls recorded for review by clients ans well as supervisors, for performance evaluations……I also notice another posting with the same question, hopefully one of you will get the information you are looking for. <a href=”http://itknowledgeexchange.techtarget.com/itanswers/live-call-monitoring/#viewanswer”>
there is also a company called Spescom Datavoice that spesialise in voice recording over telephones, maybe they can be a bigger help to you. they record over voip, analog and digital phones.