6-9
Cisco Unified IP Phone 7970G/7971G-GE Administration Guide for Cisco Unified Communications Manager 6.1
OL-14626-01
Chapter 6 Customizing the Cisco Unified IP Phone
Configuring Wideband Codec
Configuring Wideband Codec
If Cisco Unified Communications Manager has been configured to use G.722
(G.722 is enabled by default for the Cisco Unified IP Phone 7970 Series) and if
the far endpoint supports G.722, the call connects using the G.722 codec in place
of G.711. This situation occurs regardless of whether the user has enabled a
wideband headset or wideband handset, but if either the headset or handset is
enabled, the user may notice greater audio sensitivity during the call. Greater
sensitivity means improved audio clarity but also means that more background
noise can be heard by the far endpoint—noise such as rustling papers or nearby
conversations. Even without a wideband headset or handset, some users may
prefer the additional sensitivity of G.722. Other users may be distracted by the
additional sensitivity of G.722.
The following parameters in Cisco Unified Communications Manager
Administration affect whether wideband is supported for this Cisco Unified
Communications Manager server or a specific phone:
•
Advertise G.722 Codec—From Cisco Unified Communications Manager
Administration, choose
System > Enterprise Parameters
. The default value
of this enterprise parameter is True, which means that all Cisco Unified IP
Phone Series that are registered to this Cisco Unified Communications
Manager advertise G.722 to Cisco Unified Communications Manager. If each
endpoint in the attempted call supports G.722 in its capabilities set, Cisco
Unified Communications Manager chooses that codec for the call.
•
Advertise G.722 Codec—From Cisco Unified Communications Manager
Administration, choose
Device > Phone
. The default value for this
product-specific parameter is the value that is specified in the enterprise
parameter. If you want to override this on a per-phone basis, choose Enabled
or Disabled in the Advertise G.722 Codec parameter on the Product Specific
Configuration area of the Phone Configuration window.
Configuring the Idle Display
You can specify an idle display that appears on the phone LCD screen. The idle
display is an XML service that the phone invokes when the phone has been idle
(not in use) for a designated period and no feature menu is open.
Содержание 7970G - IP Phone VoIP
Страница 4: ......