Dial w Voice-Modem in FireFox

Develop a FireFox plug-in or module that can dial out using acomputer's voice modem and can be controlled from the website in thebrowser using JavaScript. Operations supported should include: ? ? ? * dial a number ? ? ? * hangup The program should instruct the modem not to do any carrier/signal detection. Please provide an estimate that includes: - technology you would use (is it a plug-in, is it a control) - price to develop it completely Note: Shall a bidder be selected, actual work might not be requested to start for up to a week later.