Inter-Tel 550.8620 Axxess Black IP Phone Power::Add Power Supply and YY741 stacking modules are

and YY741 stacking modules are supported by the switch

The Adtran 4242924L1 Total Access 924e (2nd Gen) is an IP business gateway solution for your business

The switch is Gigabit

Mitel Superset 410 Features:

The Adtran 1200346L2 is an Atlas 550 module that provides four T1 ports and one HSSI interface for high-speed data applications

Inter-Tel 550.8620 Axxess Black IP Phone Power::Add Power Supply and YY741 stacking modules areInter Tel 550. 8620 Axxess IP Phone Description: The Inter Tel 550. 8620 is an IP phone designed to work on the Inter Tel Mitel CS 5200 phone system. With a 2 line LCD screen, the Inter Tel 8620 provides caller ID and the ability to use 4 context sensitive soft keys. The 550. 8620 also has 23 programmable buttons to allow end users to program and customize their phone to their heart's content. The 550. 8620 includes a speakerphone for handsfree phone