M54!

M54 is designed to work with IG7600, Smartphone Business Communication System With IG7600, Smartphone Business Communication System and associated Apps can turn users smartphones into system extension phones. Anywhere in the world if there is WiFi or 3G(4G) smartphone coverage, users smartphones can access all local lines at the IG7600,and enjoy all business communicati ons functions such as multi-line use, intercom calls, Hold, Transfer, Conference, voice mail, music on hold,Auto-attendant, and many more. It is a totally NEW concept that business users do not need to be at office to conduct business communications.