Aastra Telecom SISIP 57I CT - Manual (Page 155)

Operational Features
41-001160-00, Rev 01 Release 2.0 5-27
Operational IP Phone Features
Operational IP Phone Features Programmable Keys (53i, 55i)
The following table provides the number of softkeys and programmable keys you
can configure, and the number of lines available for each type of phone.
*The 536EM expansion module consists of 36 softkeys. You can have up to 3 expansion modules on an IP phone
totaling 108 softkeys.
IP Phone
Model Softkeys
Additional Softkeys
with Expansion
Modules
Programmable
Keys
Lines
Available
Handset
Keys
Available
53i - - 6 9 -
55i 6 36 to 108*
(Model 536EM)
6 9 -