Patent ID: 8325617
Filing Date: 2012-12-04
Classification: H04L

Abstract:
1. A communication system comprising: a plurality of branches of a network that are connected to each other via the network, each of the branches comprising: a switch device connected to the network, the switch device managing communications for the end point devices of the plurality of branches of the network; each of the survivability proxy devices of the plurality of branches providing at least one communication feature for the end point devices of the branch of that survivability proxy device when a network error that isolates the branch of that survivability proxy device from the network occurs; each of the survivability proxy devices sending at least one message to the switch device to poll the switch device after the network error occurs to attempt to re-establish connectivity with the switch device; for each survivability proxy device, the switch device receiving one of the at least one message sent by the survivability proxy device to re-establish connectivity with the switch device and assessing that received message, the received one of the at least one message being in a queue for the switch device; for each survivability proxy device, the switch device assessing the received one of the at least one message sent by the survivability proxy device to re-establish connectivity with the switch device via a method comprising: