Lancom LC-1823 Manuals page 26

router operates as the DHCP and DNS server in the LAN and local
authentication is switched off (default setting), then a SIP telephone that finds
the SIP realm by DNS only requires this number in order to register.
It is very easy to set up the telephone number on a telephone that
supports LANCOM Easy Setup: After starting the SIP telephone in its
factory settings, it may be necessary to make some basic settings such as
language, time, time zone, etc.
No account has been configured yet, so the device will request that you
enter details for the first SIP account. All you have to do is to enter the
internal telephone number and confirm. If the device supports LANCOM
Easy Setup, then the setup is complete.
If you have set up the VoIP Call Manager to force the authentication

of local subscribers, then the SIP telephone will request the entry of
the password for the associated account.
The SIP phone now tries to register at the LANCOM Business-VoIP-Router
with the number entered. If registration is successful, the telephone displays
its internal telephone number. You can also check the registration in
LANmonitor: All registered users have an entry which displays their current
status.
If necessary, please refer to the documentation for your device for

information on these settings.
LANCOM VoIP Routers: PBX Functionalities
Chapter 3: Configuring the VoIP functions
25