Edgewater Networks has added VoIP survivability features to its EdgeMarc line of VoIP CPE appliances. The new functionality provides local call switching in the event of wide area network (WAN) link failures, softswitch failures or during periods of network congestion that result in a loss of connectivity to the softswitch. Edgewater provides the ability to detect a loss of connectivity to the softswitch, a fallback mode of operation offering station-to-station calling for locally connected subscribers and automatic recovery of call control to...