Registrar server address (URI)
FQDN of the registrar server or the SIP domain, that is, the hostname part of the user’s SIP URI. Port number and transport protocol may be included if needed, for example, registrar.example.com:5068;transport=UDP.
Value can be given without sip: or sips: prefix in which case sip: is automatically added.
User name (AAUTHNAME)
Required for user authentication. Depending on the proxy vendors chosen configuration, this value may be the same as the public user name. This parameter is often called a private user ID. Normally it is the same value as for the proxy authentication. (For situations where AAUTHNAME is the same as the public user name, see Proxy server.
Password (AAUTHSECRET)
Required for registrar authentication. Typically the same as for the proxy authentication, but depends on the proxy vendors chosen configuration.
Realm (AAUTHDATA)
The realm parameter sent by the registrar in the 401 response to an authentication challenge. The recommended value is the SIP domain. The value must be the same as the value the registrar is configured to use, values is case sensitive.
If no value is given for this parameter in the settings, it is read from the 401 response.
Authentication method (AAUTHTYPE)
This parameter indicates used authentication method. The value must be HTTP-DIGEST.