Aastra Telecom 53I - Manual (Page 12)

Hardware Support
6 RN-001029-00, Rev 03, Release 2.1
IP Phone Release Notes 2.1
55i Supports 560M Expansion Module
The 55i IP Phone now supports the optional 560M Expansion Module (previously
only supported on the 57i and 57i CT). This module adds 60 additional softkeys to
the IP phone (using the 3 function keys on the bottom right of the unit). The 560M
module provides an LCD display for displaying softkey labels. Up to 3 modules
can be piggy-backed to provide up to 180 additional softkeys for the phone.
560M
Module
Expansion
560M
Module
Expansion