Mitel Aastra M685i Expansion Module (50006820, 80C00007AAA-A) Monitors The Nortel M7310 is a

The Nortel M7310 is a fully-featured telephone which is designed for users with more extensive calling and call handling requirements

With a large display and 6 soft keys

The HP JC772A has a switching capacity of 1

The Polycom IP 501 can be powered through either an 802

There is no difference between the phones

Mitel Aastra M685i Expansion Module (50006820, 80C00007AAA-A) Monitors The Nortel M7310 is aMitel Aastra M685i Expansion Module Description: The Mitel M685i module, previously Aastra M685i, is an expansion module designed to fit the 6865, 6867, and the 6869 model phones. This module adds BLF and programmable buttons to your phone. This module is easily installed as the connector is built in to the unit versus having a removable cable like the older models. Mitel 50006820, 80C00007AAA A Features: 28 Programmable Buttons LED Status Indicator