AASTRA 6757i Installation Guide EN - Manual (Page 31)

Model 57i IP Phone Installation Guide 25
Model 536 and 560 Expansion Modules
Additional modules (up to 3 total modules) can be piggy-backed to an
existing module providing an additional 108 softkeys with 536EMs and an
additional 180 softkeys with 560EMs. You connect the additional modules
to the right side of an existing module. The following figure illustrates the
addition of multiple 536EM modules on the 57i IP Phone.
You can configure the softkeys via the configuration files or the Aastra
Web UI. See the Aastra 57i SIP IP Phone User Guide for more
information about using the 560EM on the 57i IP phone.
Installing the 536EM or 560EM
On the 536EM, there are 18 softkeys in each column (totaling 36 keys) on
the keypad. On the 560EM, there are 10 softkeys in each column (totaling
20 keys) on the keypad. The 560EM also provides 3 keys at the bottom left
of the unit that allow you to configure 20 keys for each button (totaling 60
softkeys).
The module connects to the right side of the 57i IP phone via an RJ-45
connector.
536EM 560EM