Installing IP500/IP500 V2 Page 366
15-601042 Issue 28c (19 August 2013)IP Office 9.0
10.12.11 XM24
The maximum number of button module buttons supported, of any type, on a single system is 1024 .
Connects to the XM24 port on the base of 6416 and 6424 phones. Requires the phone to have a separate power supply
using an Avaya 1151D1 or 1151D2 power supply unit and a power outlet socket are required. For additional limitations
see Phone Add-Ons .