Block Calls from Unregistered Users

Make sure that calls from unregistered users are blocked (rejected) and that calls from only registered users are allowed.

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To block calls from unregistered users:

1.

Open any of the following tables, depending on your specific configuration requirements:

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SIP Interfaces table (Setup menu > Signaling & Media tab > Core Identities folder > SIP Interfaces)

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SRDs table (Setup menu > Signaling & Media tab > Core Identities folder > SRDs)

2.

From the 'User Security Mode' drop-down list, select Accept Registered Users: