User Guide for the SIP-T28P IP Phone 
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To configure auto redial via phone user interface: 
1.  Press Menu->Features->Auto Redial. 
2.  Press          or          , or the Switch soft key to select Enabled from the Auto Redial 
field. 
3.  Enter the desired time in the Redial Interval field. 
The default time interval is 10 seconds.   
4.  Enter the desired number of redial attempts in the Redial Times field. 
The default times are 10. 
 
5.  Press the Save soft key to accept the change or the Back soft key to cancel. 
Auto redial is configurable via web user interface at the path Features->General 
Information. 
To use auto redial: 
When the called party is busy, the following prompt will appear on the LCD screen of the 
phone: