User Manual

Model 536 and 560 Expansion Modules (536EM, 560EM)
The 57i CT IP Phone offers optional Expansion Modules that attach to the
right side of the phone to provide additional softkeys.
The 536EM provides 36 additional softkeys on a 57i CT IP Phone. The
560EM provides 60 additional softkeys. The softkeys support the following
features:
•BLF
• Speedial
• Shared Call Appearance
Each key provides an LED for indicating call status. The 536EM provides a
paper label for convenient key labeling, and the 560EM provides an LCD
for displaying key labeling.
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 CT IP Phone.