AASTRA 53i sip ip phone Release Note

RN-001029-00, Rev 01, Release 2.0

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SIP IP Phone Models 53i, 55i, 57i, 57i CT Release Notes

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 displaying softkey labels. Up 

to 3 modules can be piggy-backed to 

provide up to 180 additional softkeys 

for the phone.