Lancom LC-1823 Manuals page 23

LANCOM VoIP Routers: PBX Functionalities
Chapter 3: Configuring the VoIP functions
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Entering your national and area code enables the Call Router to handle
local or national calls in certain ways.
Once the configuration is completed, the wizard displays an overview of
the call routes that are to be generated. Further information on the
function of call routes and their significance is available in the LCOS
reference manual.
Well done! You have configured the LANCOM VoIP Router as the local
PBX. Please observe the following information to set up the various
terminal devices.