Tekelec announced that "Telstra Global is offering LTE roaming services across the Asia-Pacific (APAC) region using Tekelec’s Diameter Signaling Router (DSR). Tekelec’s market-leading DSR is providing the diameter signaling hub for Telstra Global’s IPX service announced last month. It enables the secure exchange of authorization, authentication, billing, charging and network policies that use the diameter protocol to maintain subscribers’ LTE services while visiting international markets"
Possibly related post - "Telstra Deploys PCC and DPI to Monetize OTT" - here.
See "Telstra Global taps Tekelec for new LTE services" - here.