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Cisco Unified 6921 Note di rilascio
Cisco Unified IP Phone 6900 Series Release Notes for Firmware Release 9.4(1)

New and changed features

The following sections describe the features that are new or have changed in this release.
Note
Some features may require the installation of a Cisco Unified Communications Manager Device Package.
Failure to install the Device Package before the phone firmware upgrade may render the phones unusable.

Features available with firmware release

The following sections describe the features available with the Firmware Release.

E-SRST Service Improvements

The E-SRST Service Improvements feature adds the Video, Shared Line, and BLF features to the list of phone
features that continue under failover conditions using Enhanced Survivable Remote Site Telephony (E-SRST).
This feature depends on the Enhanced SRST (E-SRST) SIP load, and requires configuration on the SRST
server to support the feature. The feature requires the CME/E-SRST 10.0 SIP load.
This feature requires no administration.
The feature is supported on the following phones:
• Cisco Unified IP Phone 6921 (SIP)
• Cisco Unified IP Phone 6941 (SIP)
• Cisco Unified IP Phone 6945 (SIP)
• Cisco Unified IP Phone 6961 (SIP)
Where to find more information
• Cisco Unified IP Phone 6921, 6941, 6945, and 6961 Administration Guide for Cisco Unified
• Cisco Unified IP Phone 6921, 6941, 6945, and 6961 User Guide for Cisco Unified Communications

PSTN Mode

The PSTN Mode feature improves conversation audio quality. The feature is already supported on the Cisco
Unified IP Phones 6921, 6941, and 6961, and is now supported on the Cisco Unified IP Phone 6945.
This feature is internal to the phone and has no administrator or user action impact.
The feature is supported on the following phones (SCCP and SIP):
• Cisco Unified IP Phone 6945
Communications Manager 10.0 (SCCP and SIP)
Manager 10.0 (SCCP and SIP)
Cisco Unified IP Phone 6900 Series Release Notes for Firmware Release 9.4(1)
New and changed features
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