Hyundai H-MP510 - Manual (Page 21)

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Note: For speed dialing, you have to push down key 1-9 for over 2 seconds. If the shortcut key pressed is not
defined in phonebook, then you can not dial out.
View last numbers
The handset can save 30 latest communicating numbers. Pushing down the calling key in standby mode can
display the latest numbers. You can press the calling key to directly dial out the number by selecting the number
required with the direction keys.
Send DTMF
When DTMF tone function has been set, the numeric key you entered from the keypad and and
key will be transmitted to the recipient as DTMF tone in a communication. If you do not apply such a function,
you can not dial an extension.
Microphone silence function
There is a prompt in the lower right corner of the screen during the communication, pushing the right-soft key
to close the microphone, now the screen appears Call mute . In this situation, the recipient cannot hear you, but you
can still hear him (the earpiece is still on), re-press the right-soft key to enable the microphone, press the on-hook key
to hang up.