Multi-Tech Systems MVP210-SS manual Pbx, 216

T1 Phonebook Configuration			MultiVOIP User Guide
		Alternate Routing Field Definitions
	Field	Values	Description
	Name
	Alternate	n.n.n.n	Alternate destination for outbound data traffic
	IP	where	in case of excessive delay in data transmission.
	Address	n= 0-255
	Round	milliseconds	The Round Trip Delay is the criterion for
	Trip		judging when a data pathway is considered
	Delay		blocked. When the delay exceeds the
			threshold specified here, the data stream will
			be diverted to the alternate destination
			specified as the Alternate IP Address.

The Alternate Routing function facilitates PSTN Failover protection, that is, it allows you to re-route voip calls automatically over the PSTN if the voip system fails. The MultiVOIP can be programmed to respond to excessive delays in the transmission of voice packets, which the MultiVOIP interprets as a failure of the IP network. Upon detecting an excessive delay in transmission of voice packets (overly high “latency” in the network) the MultiVOIP diverts the call to another IP address, which itself is connected to the PSTN (for example, via an FXO port on the self-same MultiVOIP could be connected to the PSTN).

3.Call diverts to Alt IP address in voip accessing PSTN line.

FXO

VOIP

FXS

1. Call originates.

PSTN Line

IPVOIP

NETWORK

2. IP network fails.

4.Call completed via PSTN.

PBX

PSTN Failover Feature. The MultiVOIP can be programmed to divert calls to the PSTN temporarily in case the IP network fails.

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