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Branch-Site Resiliency Features

 

Topic Last Modified: 2010-11-07

If you provide branch-site resiliency, if a branch site’s WAN connection to a central site fails or if the central site is unreachable, the following voice features should continue to be available:

  • Inbound and outbound PSTN calls

  • Enterprise calls between users at both the same site and between two different sites

  • Basic call handling, including call hold, retrieval, and transfer

  • Two-party instant messaging

  • Call forwarding, simultaneous ringing of endpoints, call delegation, and team call services, but only if the delegator and delegate (for example, a boss and the boss’s administrator), or all team members, are configured at the same site

  • Call detail records (CDRs)

  • PSTN dial-in conferencing with Conferencing Auto-Attendant

  • Voice mail capabilities, if you configure voice mail rerouting settings. (For details, see Branch-Site Resiliency Requirements.)

  • User authentication and authorization

The following features will be available only if your resiliency solution is a full-scale Microsoft Lync Server 2010 deployment at the branch site:

  • IM, web and A/V conferencing

  • Presence and DND-based routing

  • Updating call forwarding settings

  • Response Group service and Call Park

  • Provisioning new phones and clients, but only if Active Directory Domain Services (AD DS) is present at the branch site.

  • Enhanced 9-1-1 (E9-1-1)

    If E9-1-1 is deployed, and the SIP trunk at the central site is not available because the WAN link is down, then the Survivable Branch Appliance will route E9-1-1 calls to the local branch gateway. To enable this feature, branch-site users’ voice policies should route calls to the local gateway in the event of WAN failure.