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We seek a programmer skilled with PHP and SIP protocols to create a utility module whereby a user will be able to store their SIP account credentials in to a web based CRM system and press 'Dial' to initiate a call to the selected contacts phone number.
You will provide:
* Details of required fields. (Sip account, Domain, SIP account Password, etc.)
* Code that will be called by the 'Dial' button.
* Note: The code will include a handler for 'onhangup()' to allow us to automatically initiate further actions after the call disconnects.
We appreciate that not all SIP soft phones are the same so, the code must work with a minimum of 3 freely available/popular SIP soft phones of your choice or an open source freely customizable SIP soft phone that can be modified visually and functionally.