User Guide for the SIP-T23P/G IP Phone 
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The line key LEDs on phone A slow flash green and phone B slow flash red when 
the bridged line call is placed on hold. 
If there is a held call between phone A and phone C, you can retrieve a held call on 
either phone A or phone B. 
To retrieve the held call on phone A: 
1.  Press the line key with the slow flashing green LED indicator or the Resume soft key 
on phone A. 
The conversation between phone A and phone C is retrieved. 
  To retrieve the held call on phone B: 
1.  Press the line key with the slow flashing red LED indicator on phone B. 
The conversation is established between phone B and phone C, phone A 
disconnects the call. 
You can send and receive text messages using the SIP-T23P/G IP phone. New text 
messages can be indicated both acoustically and visually. When receiving a new text 
message, the phone will play a warning tone. The power indicator LED will slow flash 
red, and the LCD screen will prompt “n New Text Message(s)” (“n” indicates the number 
of unread text messages. e.g., 1 New Text Message(s)) and a flashing icon          . 
Note   
 
   
When the phone receives a text message, the text message prompt window will pop up 
by default, if you want to disable the feature, contact your system administrator for more 
information.