[Example]PBX-1V-IPGW Private IPNetworkPBX-2IP-GW(1)IP-GW(2)PBX-3IP-GW(3)IP-GW(4)Gateway Settings List1. IP-GW(1): GW Group-12. IP-GW(2): GW Group-13. IP-GW(3): GW Group-24. IP-GW(4): GW Group-2Office A (GW Group-1)Dials "123XXX"Office B (GW Group-2)BusyReroutedLeading NumberList1. 1xx: GW Group-12. 2xx: GW Group-2When "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 LinesWhen a VoIP call cannot be completed successfully, the PBX can automatically attempt to make the call usinga public CO line instead. This provides a backup method of making calls in cases when IP network transmissioncannot be completed successfully.[Example]PBX-1 PBX-2Extn.1000 Extn.1011(333-123-1011)V-IPGW V-IPGWDials"7-20-1011".Private IPNetworkTelephone Company(area code: 222)Telephone Company(area code: 333)PBX code: 20PBX code: 301-333-123-1011The leading numbers of extensions accessed through the VoIP network are added as entries to the QuickDialing 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 2009-1213.1.25 Private Network Features—VoIP (Voice over Internet Protocol)
