Panasonic KX-TDA200 Features Manual page 350

1.30.2 Voice over Internet Protocol (VoIP) Network
[Explanation]
Calls to destinations with leading number "2" or "3" are automatically routed through the IP-GW ports,
designated as trunk group 2.
•
IP-GW (IP Gateway Circuit)
IP address assignment for the local PBX and other PBXs.
[Programming Example]
Leading No.
2
3
:
[Explanation]
Calls are routed to the IP address of each IP-GW card based on the leading number dialled.
Automatic Rerouting of Calls via a Private IP Network to Public Trunks
When a call via a private IP network 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 private
IP network transmission cannot be completed successfully.
[Example]
Telephone Company
(area code: 098)
PBX-1
Extn .1000
Dials
PBX code: 30
"7-20-1011".
The leading numbers of extensions accessed through the private IP 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 via the private IP 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 via the private IP 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.
350 Feature Guide
Destination
012-345-1011
Private IP
IP-GW
Network
IP Address
200.45.11.35
199.176.64.1
:
Telephone Company
(area code: 012)
PBX-2
IP-GW
PBX code: 20
Destination No.
9012345
Extn .1011
(012-345-1011)