[asterisk-users] How to restrict a Polycom from receiving unauthorized calls

[Yehavi Bourvine +972-8-9489444]

Hello,

  I've found that my Polycom-501 accepts INVITES from any server in the
world... I would like to restrict it to accept calls only from the servers
listed in its config file, but I cannot find anything in the documentation. Any
idea?

                          Thanks, __Yehavi: