User Guide for the SIP-T23P/G IP Phone 
16 
Line key LED (associated with a bridged line) 
The local BLA phone indicates the phone is involved in a BLA call, while the monitoring 
BLA phone indicates the phone is not involved in the BLA call. 
The bridged line is idle. 
The bridged line receives an incoming call. 
Solid green (for local BLA 
phone) 
Solid red (for monitoring BLA 
phone) 
The bridged line is in conversation. 
The bridged line is dialing. 
The bridged line is seized. 
Slow flashing green (for 
local BLA phone) 
Slow flashing red (for 
monitoring BLA phone) 
The bridged line conversation is placed on hold. 
Note 
Two ways to customize configurations of your SIP-T23P/G IP phone: 
  The user interface on the IP phone. 
  The user interface in a web browser on your PC. 
The hardware components keypad and LCD screen constitute the phone user interface, 
which allows the user to execute all call operation tasks and basic configuration 
changes directly on the phone. In addition, you can use the web user interface to 
access all configuration settings. In many cases, either the phone user interface and/or 
the web user interface interchangeably. However, in some cases, it is only possible to 
use one or the other interface to operate the phone and change settings. 
You can customize your phone by pressing the Menu soft key to access the phone user 
interface. The Advanced Settings option is only accessible to the administrator, and the 
default administrator password is “admin” (case-sensitive). For more information on 
customizing your phone with the available options from the phone user interface, refer 
The above introduces the default LED status. The statuses of the power indicator LED and 
BLF key are configurable via web user interface. For more information, refer to 
Yealink_SIP-T2_Series_T19(P) E2_T4_Series_CP860_IP_Phones_Administrator_Guide.