Panasonic hybrid ip-pbx kx-tda50 用户手册

下载
页码 160
4.3 Tone
User Manual
153
Tone 3
Before the following features 
activate:
Retrieving a held call
Picking up another 
call
Paging/Answering a 
paging 
announcement
Answering the call 
through a speaker
Tone 4
Establishing or leaving a 
conference
Tone 5
A call has been put on hold.
1 s