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4.3.2 Voice over Internet Protocol (VoIP) Network
[Programming Example]
Leading No.
2
3
:
[Explanation]
Calls are routed to the IP address of each V-IPGW/IP-GW card based on the leading number dialled.
Automatic Rerouting of VoIP Calls to Public Trunks
When a VoIP call cannot be completed successfully, the PBX can automatically attempt to make the call
using a public trunk instead. This provides a backup method of making calls in cases when IP network
transmission cannot be completed successfully.
[Example]
Telephone Company
(area code: 098)
PBX-1
V-IPGW
Extn .1000
Dials
PBX code: 30
"7-20-1011".
The leading numbers of extensions accessed through the VoIP network are added as entries to the Quick
Dialling table, in addition to being registered as Other PBX Extension Numbers, as shown below:
[Programming Example]
Number to dial to call an extension at another PBX using VoIP network:
7 (TIE line access number) + 20 (PBX Code) + 1011 (extension number)
Number to dial to call that extension using a public trunk:
9 (trunk access number) + 012-345-1011
[Quick Dialling Table]
Quick Dialling No.
720
If the call cannot be completed using the VoIP network, and the dialled leading number is found in the Quick
Dialling Table, the call will be automatically rerouted to a trunk as specified by the corresponding destination
number.
When a call is made using the VoIP network, if the PBX does not receive a reply from the other PBX within
about 4 seconds of making the call, or an error is returned, the call is rerouted to a public trunk as specified.
Automatic Rerouting of VoIP Calls to Public Trunks using ARS
When dialling an outside party using ARS, the call can be rerouted to a public trunk if the call cannot be
completed successfully.
364
Feature Manual
Destination
IP Address
200.45.11.35
199.176.64.1
012-345-1011
Private IP
Network
:
Telephone Company
(area code: 012)
PBX-2
V-IPGW
PBX code: 20
Destination No.
9012345
Extn .1011
(012-345-1011)
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