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Model 6751i IP Phone User Guide 97
Additional Features
3. The "Microphone Mute" field is enabled by default. The microphone is muted on the IP
phone for Intercom calls made by the originating caller. To disable this field, uncheck the box.
4. The "Play Warning Tone" field is enabled by default. If “Auto-Answer” is enabled, the phone
plays a warning tone when it receives in incoming intercom call. To disable this field, uncheck
the box.
5. The "Allow Barge In" field is enabled by default. If “Allow Barge In” is enabled, the phone
puts an active call on hold and answers the incoming Intercom call. To disable this field,
uncheck the box.
6. Click to save your settings.
Using Redial Key for “Last Number Redial”
The IP phone has an enhanced redial user interface that allows a user to quickly redial the last
number that was dialed out from the phone. You can:
• Press the REDIAL button twice to redial the last number dialed.
• Press the REDIAL button once, scroll the list of numbers, then press the REDIAL button again
to dial the number that displays on the screen.
The “last number redial” feature for the Redial key is static and is not configurable.
Group RTP Paging (Receiving End Only)
You can configure the phone to allow it to receive a Real Time Transport Protocol (RTP) stream to/
from pre-configured multicast address(es) without involving SIP signaling. This is called Group
Paging on the IP phones. You can specify up to 5 listening multicast addresses to listen for on the
network.. This feature is configurable using the Aastra Web UI only.
The 6751i in the local network listens for RTP on the preconfigured multicast address. The Phone
displays the “Paging” message to the phone’s LCD. It uses the G711 uLaw CODEC for multicast
RTP.
The recipient can drop the incoming page if required. The recipient can also set Do Not Disturb
(DND) to ignore any incoming pages.
For incoming RTP multicasts, the ringing display is dependant on the setting for the “Allow
Barge-In” parameter. (See “Allow Barge In” on page 96.) If this parameter is disabled, and there
is no other call on the phone, then the paging is automatically played via the default audio device.
Note: If the Auto-Answer field is not checked (disabled), the phone rejects the
incoming intercom call and sends a busy signal to the caller.