Registration Restriction Control

The device provides flexibility in controlling user registrations:

■

Limiting Number of Registrations: You can limit the number of users that can register with the device per IP Group, SIP Interface, and/or SRD, in the IP Group, SIP Interface and SRDs tables respectively. By default, no limitation exists.

■

Blocking Incoming Calls from Unregistered Users: You can block incoming calls (INVITE requests) from unregistered users belonging to User-type IP Groups. By default, calls from unregistered users are not blocked. This is configured per SIP Interface or SRD. When the call is rejected, the device sends a SIP 500 (Server Internal Error) response to the remote end.