User Guide for the SIP-T19P/SIP-T19 IP Phone
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4.
(Optional. ) Enter the anonymous call rejection on code in the Reject On Code field.
5.
(Optional.) Enter the anonymous call rejection off code in the Reject Off Code field.
6.
Press the Save soft key to accept the change or the Back soft key to cancel.
Anonymous call rejection is configurable via web user interface at the path
Account->Basic.