User Guide for the SIP-T23P/G IP Phone 
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The LCD screen of phone B prompts an incoming call from anonymity. 
 
You can use anonymous call rejection to reject incoming calls from anonymous callers. 
Anonymous call rejection automatically rejects incoming calls from callers who 
deliberately block their identities and numbers from being displayed. Anonymous call 
rejection is configurable on a per-line basis. You can also configure the phone to send 
anonymous call rejection on/off code to the server to activate/deactivate anonymous 
call rejection on the server side. 
To configure anonymous call rejection via phone user interface: 
1.  Press Menu->Features->Anonymous Call. 
2.  Press        or          , or the Switch soft key to select the desired line from the Line ID 
field. 
3.  Press        or          to scroll to the Anonymous Rejection field. 
4.  Press          or          , or the Switch soft key to select Enabled from the Anonymous 
Rejection field. 
 
5.  (Optional.) Press          or          , or the Switch soft key to select the desired value 
from the Send Rejection Code field. 
The phone will send the configured on code or off code depending on your 
selection when you enable or disable anonymous call rejection feature on the 
phone. 
6.  (Optional.) Enter the anonymous call rejection on code in the Reject On Code field. 
7.  (Optional.) Enter the anonymous call rejection off code in the Reject Off Code field. 
8.  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.