Phone Features - D-Link DPH-80 Manual

Using H.323 Protocol
Using the H.323 Phone

Phone Features

MUTE: When pressed the H.323 phone turns off the microphone signal
from the handset but still plays the voice from the other party.
HOLD: When pressed, the H.323 phone disconnects both microphone
and speaker while the connection is kept alive. No voice packets are
transmitted from the D-Link DPH-80 phone. The hold LED is on. The user
may press the button again to release the call. This feature requires support
from the remote phone for proper functioning.
REDIAL: When pressed, redials last dialed number.
TRANSFER: Toggle the hook-switch quickly to flash the call. The phone
plays the dial tone. Then dial the new party's number to transfer the call.
The H.323 phone transfers the call and plays a busy tone. Flashing the
hook twice before dialing the number will restore the call to normal state
(call-active state).
SPEAKER: One-touch dialing key. When pressed, the speaker and speaker
LED are on while on-hook. If the user off-hooks after dialing or presses
the button again, the one-touch operation is terminated and the LED and
speakers turn off.
Algorithms
Codecs: D-Link H.323 phones supports G.711 U/A law, G.723.1, and
G.729AB. The browser configuration allows selecting the codec and its
priority.
Voice activity detection, silence suppression, and comfort noise
generation: The VAD can be disabled in the configuration irrespective of
the codec being used.
Adjustable Jitter Buffer: D-Link H.323 phones uses a robust adaptive
jitter buffer algorithm. It can be disabled and a fixed size jitter buffer can
be used instead through configuration.
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