Panasonic KX-NCP500, Manual Manual

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[Example]
PBX-1
V-IPGW
Private IP
Network
PBX-2
IP-GW(1)
IP-GW(2)
PBX-3
IP-GW(3)
IP-GW(4)
Gateway Settings List
1. IP-GW(1): GW Group-1
2. IP-GW(2): GW Group-1
3. IP-GW(3): GW Group-2
4. IP-GW(4): GW Group-2
Office A (GW Group-1)
Dials "123XXX"
Office B (GW Group-2)
Busy
Rerouted
Leading Number
List
1. 1xx: GW Group-1
2. 2xx: GW Group-2
When "123XXX" is dialed, the call is routed to GW Group-1. However the lowest-numbered device (V-IPGW(1))
is busy or not available, so the call is rerouted to V-IPGW(2).
Automatic Rerouting of VoIP Calls to Public CO Lines
When a VoIP call cannot be completed successfully, the PBX can automatically attempt to make the call using
a public CO line instead. This provides a backup method of making calls in cases when IP network transmission
cannot be completed successfully.
[Example]
PBX-1 PBX-2
Extn.1000
Extn.1011
(333-123-1011)
V-IPGW V-IPGW
Dials
"7-20-1011".
Private IP
Network
Telephone Company
(area code: 222) Telephone Company
(area code: 333)
PBX code: 20 PBX code: 30
1-333-123-1011
The leading numbers of extensions accessed through the VoIP network are added as entries to the Quick
Dialing 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 CO line:
9 (CO line access number) + 1-333-123-1011
[Quick Dialing Table]
258 Feature Manual Document Version 2009-12
13.1.25 Private Network Features—VoIP (Voice over Internet Protocol)