User Guide for the SIP-T21P/SIP-T21 IP Phone
4
A call cannot be recorded
Recording starts successfully
Recording cannot be started
Recording cannot be stopped
The phone is initializing.
The phone is busy.
The phone is idle.
The call is placed on hold or is held.
The phone receives a text message or voice mail.
Fast flashing green (300ms)
The phone is ringing.
The call is mute.
The phone is powered off.
The line is in conversation.
The line is seized.
The line receives an incoming call.
The call is placed on hold.
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