User guide

Chapter 5: Phonebook Configuration
Multi-Tech Systems, Inc. 68
PSTN Failover Feature. The MultiVOIP can be programmed to divert calls to the PSTN temporarily in case the IP
network fails. See Figure below for example.
IP
NETWORK
FXS
FXO
VOIP
VOIP
PBX
PSTN Line
1. Call originates.
2. IP network fails.
3. Call diverts to
Alt IP address in voip
accessing PSTN line.
4. Call completed
via PSTN.
Figure 5-4: PSTN failover
Inbound Phone Book/List Entries
Figure 5-5: Inbound phonebook entries