| 摘要 |
<p>Systems and methods for a Survivable Branch Office are provided by embodiments of the invention. The Survivable Branch Office includes a plurality of interconnected packet- ibased network devices, wherein the Branch Office is adapted to operate in a first mode during which centralized telephony call processing services are supplied to the Branch Office by a Main Office via a connection between the Branch Office and the Main Office. The Branch Office is also adapted to operate in a second mode when the connection between the Branch Office and the Main Office is interrupted. In the second mode the plurality of interconnected packet-based network devices collectively provide telephony call processing services in a distributed manner for the Branch Office. The network devices in some instances are packet-based peer-to-peer terminal sets, wherein the terminal sets themselves can collectively provide required telephony services normally supplied by the Main Office, by operating in a peer-to -peer mode when connection is lost with the Main Office.</p> |
