The SBM24-key module increases the number of line keys and function keys for calls
on your phone. It provides 24 additional lines for incoming and outgoing calls and
Call functions. Typical applications are:
● creation of additional lines for calls from one or more other
Extensions have been bridged,
● creation of speed dial buttons and
● Creation of buttons to access additional switching functions such as call forwarding
access it.
Note that line keys and functions