User guide

Chapter 4: Configuring Your MultiVOIP GSM
Multi-Tech Systems, Inc. MVPGSM 65
Local Survivability
Local Survivability works in two ways:
IP Survivability will see if the IP link (WAN/LAN) is up, if not the call will be routed using the Outbound
Phone Book with a new survivability number configured (where the IP address could be on the local network
or a sub network address).
Internal Survivability will see if the IP link (WAN/LAN) is up and if not, it will route the call according to the
settings in the Inbound Phone Book with a new survivability number configured (provides GSM failover).