High Availability (HA) Asterisk solutions, once reserved for mission critical deployments, are now a part of every normal setup. With VoIP, clustering solutions depend on moving the IP traffic to a working server. Setting up a main and standby Asterisk system allows continuous availability of such a working Asterisk system. But telephony is more than a data system using IP traffic and such an HA arrangement is inadequate in ensuring the continuation of all the on-going calls at the time of the hardware or software failure. Going beyond this high availability for Asterisk, is the patented call survival method (US Patent US 20110310773 A1) and system that keeps calls alive while providing high availability.
A call center software manages hundreds of calls in different queues, connecting them appropriately. The call center ACD is a layer above the PBX which controls the routing through skills based routing and queue prioritization. When a software or hardware failure is encountered, all the on-going conversations and calls in the queue are lost. HA for Asterisk will get your system ready for future calls. With Call survival, the callers will be able to continue their on-going conversations or calls without the need to re-initiate. Implementation of call survival in call center solutions offers a redundancy beyond the normal high availability solutions implemented for Asterisk based call centers.