Auerswald COMmander 6000 Advanced Information page 519

Using numbers with few digits (two- or three-digit numbers) inevitably
restricts the possible supply of numbers that require more digits. For
example, if the phone number 12 is assigned, the phone numbers 120
to 129 and 1200 to 1299 are no longer available.
The default exchange line access number on the PBX is 0 in the factory
settings. However, this can be changed. Note that changing the
exchange line access number restricts the phone numbering plan.
User name
User name assigned by the VoIP provider when the account was set up. It
is used to identify the user to the VoIP provider.
Notes:
Note that some providers allocate both login information for the web
page and separate login information for using the Voice over IP service
(e.g. a dial-in password). Find out what information is needed for the
dial-in and enter it accordingly.
The user name is called different things by different providers. For
example, the terms Username, Authorization User, SIP code/SIP
password and SIP-ID are all used to describe a user name.
If your provider (in Germany) is T-Online, you must also enter the VoIP
phone number you received from them under User name and Display
name.
COMmander 6000/R/RX - Firmware V7.0D - Advanced Information V19 04/2018
Settings – Public switched tel. networks
Voice over IP (VoIP)
519