Aastra Telecom SISIP 57I CT - Manual (Page 19)

IP Phone Models
41-001160-00, Rev 01 Release 2.0 1-3
Overview
Overview The following illustration shows IP phone optional accessories for the 55i, 57i,
and 57i CT IP phones.
The 536EM module adds 36 additional softkeys to the IP phone models 55i, 57i,
and 57i CT. The 536EM provides paper labels for each softkey. Up to 3 modules
can be piggy-backed to provide up to 108 additional softkeys for the phone.
The 560EM module adds 60 additional softekeys to the IP phone models 57i and
57i CT (using the 3 function keys on the bottom right of the unit). The 560EM
module provides an LCD display for display softkey labels. Up to 3 modules can
be piggy-backed to provide up to 180 additional softkeys for the phone.
Reference
For more information about installing and using the expansion modules, see your
phone-specific Installation Guide and User Guide.
536EM Expansion Module
for 55i, 57i, and 57i CT 560EM Expansion Module
for 57i, and 57i CT