Abstract: A system and method are disclosed herein for providing a unidirectional outage bypass for incoming communications via a hosted Voice-over Internet Protocol (VoIP) private branch exchange (PBX) system to a session initiation protocol (SIP) device. An outage monitoring system is in communication with both the unidirectional bypass system and one or more bypass enablers that act at the direction of the unidirectional bypass system. The outage monitoring system detects outages and overloads, as well as, network failures between network components, the VoIP PBX, Client Devices and the public switched telephone network (PSTN). The unidirectional bypass system, in response to detection of an outage, determines error-handling procedures for the unidirectional bypass based on bypass configuration data.

Abstract: A system and method is disclosed herein for providing a bidirectional outage bypass for a hosted voice-over Internet protocol (VoIP) private branch exchange (PBX) system. An outage monitoring system is in communication with both the bidirectional bypass system and one or more bypass enablers that act at the direction of the bidirectional bypass system. The outage monitoring system detects outages and overloads, as well as, network failures between the VoIP PBX and the public switched telephone network (PSTN). The bidirectional bypass system, in response to detection of an outage, determines error-handling procedures for the bidirectional bypass based on bypass configuration data. The bypass enablers forward outgoing communications between a client device and the PSTN, in accordance the error-handling procedures, by bypassing components that are currently experiencing failures or overloads.

Abstract: A system and method is provided for two-tiered load balancing on a hosted voice-over Internet protocol (VoIP) private branch exchange (PBX). The system includes a plurality of client devices, at least one device load balancer, and at least one call load balancer. The device load balancer identifies a device group to which each client device belongs; and a cluster of computing resources for processing calls for the device group. The cluster is assigned to the device group based on prescribed conditions. In response to a communications request, call load balancers in communication with the device load balancers dynamically determine if predefined conditions are currently being met within an identified cluster of computing resources. If the predefined conditions are currently being met, then the communications request for a primary client device associated with the request is established via one of a plurality of server nodes within the cluster of computing resources.