ShoreTel BB24 Button Box Phone Systems Adtran 1200291L6 Features:

Adtran 1200291L6 Features:

The Atlas 550 1200550L2 has built in support for up to six cards in its factory configuration

other standard feature keys

These midspan PoE injectors can be used to power ShoreTel phones

Dell PowerConnect 5548 Features:

ShoreTel BB24 Button Box Phone Systems Adtran 1200291L6 Features:ShoreTel BB24 Button Box Description: The Shoretel Button Box is a programmable expansion console with self labeling keys. The BB24 provides 24 additional lines that users can select with the push of a button. In addition to programming the buttons as lines, each programmable button can be set up as additional features instead. The button box can either be powered via the power of an attached phone or through the use of an optional power injector.