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Hold: Make the current call hold.
End: End the current call.
New call: Enter new dialing interface.
Phonebook: Enter Phonebook menu.
Messages: Enter Text Message menu.
Sound recorder: Record the sound in current call.
Mute: Setting of switches, which disables transmission of local call when
Mute function is on.
DTMF: Operations of DTMF powering on and off.
Conference*: Enter multiple party conference call state. By following the prompts, you
can have the following functions: receive waiting calls, add them into multiple party call,
maintain the multiple party call, talk privately with one party of the conference while
maintaining all other callers, connect one party in the call conference with another party while
exiting the multiple party call oneself, maintain one party of the multiple party call and end
current call and all other maintained calls.
Note: The menu marked * items will only appear in special circumstances. For
conference function, it is necessary to apply for service supply to corresponding
service operator.
