High Quality Content by WIKIPEDIA articles! Avaya IP Phone 1140E in telecommunications is a desktop IP client manufactured by Avaya for unified communications. The phone can operate on the SIP or UNIStim protocols. The SIP firmware supports presence selection and notification along with secure instant messaging. This device has an integrated 10/100/1000BASE-T autosensing Ethernet switch with two ports, an integrated USB port and is Bluetooth capable. The SIP version of this phone has full IPv6 functionality and only requires 2.9 watts of power.