To create or modify an existing SIP Local Registrar:
In the left navigation pane, go to SIP > Local Registrars.
Click the Create SIP Local Registrar icon ( ) at the top of the SIP Local Registrar Table page.
Specifies whether or not there is a limit to the number of users that can be added to this Registrar
Specifies the maximum number of contacts that are allowed to register to this registrar. Valid entry: 1 - 1000. If the specified limit is exceeded the proxy will reject the registration request.