SIP Trunking Benefits for the Enterprise Redundancy and Failover

The legacy PSTN was highly resilient and offered excellent up time for the end customer. However, an
outage with the service provider would leave end customers without service for the duration of the out-
age. With IP-based telephony, an enterprise can connect to a very large number of service
providers, providing service redundancy. This capability protects against provider network fail-
ures to assure a high level of service availability.

The enterprise can realize further cost savings when such advanced features as least cost routing (LCR)
are implemented. The VoIP system can optimize calling rates by automatically selecting the least
expensive service provider for each called number.

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