Yealink T46G Skype For Business Edition, Руководство администратора, Страница: 68 / 421

Yealink Skype for Business HD IP Phones Administrator Guide
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Branch Office Resiliency
Branch office resiliency is critical for multi-site deployments of Skype for Business where the
control servers are located at a central site or data center. It allows branch site users to continue
to have Enterprise Voice service and voice mail (if voice mail rerouting settings are configured)
when the branch site loses the connection to the central site.
When the WAN connection between the branch site and central site is unavailable, the phone
goes into resiliency mode:

Branch site user on the phone stays signed in with an indication of “Limited service due to
outage”.

Presence icon on the phone LCD screen is displayed as Unknown icon: (T46G/T48G)/
(T42G/T41P/T40P).

Call between branch site users is established successfully with 2-way audio.

Conference between branch site users can be established successfully.

The call history cannot get modified. (Already downloaded call log entries will not be
deleted)

Calls can be placed from the call history on the Skype for Business phone.

Contact list is unavailable but you can search for a contact on the Skype for Business phone.

User is not able to change his presence state manually.

User is not able to use calendar feature.

User is not able to receive the voice mail as exchange is unreachable and when Skype for
Business phone comes out of resiliency mode, it downloads the yet undownloaded voice
mail items and updates the voice mail screen.

Calls between the branch office phones can be transferred to another branch site user.

Call forward settings cannot be changed.
When the WAN connection between the branch site and central site becomes available, the
phone comes out of resiliency mode automatically. Notification of resiliency is automatically
dismissed, and you can use phone features as normal.
Note
Upgrading Firmware
Yealink supports three methods to upgrade phone firmware:

Upgrade firmware via web user interface
: Download firmware in ROM format, and
upload it to the Skype for Business phone via web user interface. This method can deploy
small number of phones.
For more information on branch office resiliency, contact your system administrator.