Global VOIP Outbound. An IPVPN or GID based service which allows you to make outgoing telephony, fax or modem calls from your wide area network to any fixed or mobile phone in 230 countries and territories worldwide. The service also supports TDM based PBXs to facilitate seamless migration to IP environments.Global VOIP Inbound. A key enabler for international call centres which allows you to receive incoming toll-free, national and/or local calls from up to 26 major markets worldwide. The service also supports TDM based PBXs to facilitate seamless migration to IP environments.Global VOIP from Telstra offers you: