Set up wideband codec

By default, the G.722 codec is enabled for your phone. If Cisco Unified Communications Manager (Unified CM) is configured to use G.722 and 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. 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 the far endpoint can hear more background noise, such as rustling papers or nearby conversations. Even without a wideband headset or handset, some users may find the additional sensitivity of G.722 distracting.

The Advertise G.722 and iSAC Codec service parameter affects whether wideband support exists for all devices that register with this Cisco Unified CM server or for a specific phone.

To configure wideband support for all devices:

In Cisco Unified Communications Manager Administration, select System > Enterprise Parameters.
Set the Advertise G.722 Codec field.

The default value of this enterprise parameter is Enabled, which means that all Cisco IP Phone Models that register to this Cisco Unified CM advertise G.722. If each endpoint in an attempted call supports G.722 in the capabilities set, Cisco Unified CM uses that codec for the call whenever possible.

To configure wideband support for a specific device:

In Cisco Unified Communications Manager Administration, select Device > Phone.
Set the Advertise G.722 and iSAC Codec parameter in the Product Specific Configuration area.

The default value of this product-specific parameter is to use the value that the enterprise parameter specifies. If you want to override this on a per-phone basis, choose Enabled or Disabled.

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