Yealink SIP-T48S, User Manual, Page: 21 / 159

Getting Started with Your Phone
17
LED Status Description
Solid green
The line is seized.
The line is in conversation.
Fast-flashing green The line receives an incoming call.
Slow-flashing green The call is placed on hold.
Off The line is inactive.
Line key LED (configured as a Forward key with a value (destination number))
LED Status Description
Solid green The always forward feature is activated.
Off The always forward feature is deactivated.
Note
If the value (the destination number) is not configured for a Forward key, the key LED glows green when the always/busy/no
answer forward feature is activated. It is off when the always/busy/no answer forward feature is deactivated.
Line key LED (configured as a BLF key or BLF List key)
LED Status Description
Solid green The monitored user is idle.
Fast-flashing red (200ms) The monitored user receives an incoming call.
Solid red
The monitored user is busy.
The monitored user’s conversation is placed on hold (This LED status requires
server support).
Slow-flashing red (1s) The call is parked on the monitored user.
Off The monitored user does not exist.
Line key LED (used as a page switch key)
LED Status Description
Solid red There is a call parked on the line whose line key is not on the current page.
Fast-flashing green The line receives an incoming call on the line key of the non-current page.
Fast-flashing red
The monitored user receives an incoming call line whose line key is not on the
current page.
Off The line keys are idle.
Line key LED (associated with a shared line)
The Local SCA Phone is involved in an SCA call, while the Monitoring SCA Phone is not involved in the SCA call and
used for monitoring shared line.