https://www.gtt.net/about-us/press-releases/gtt-expands-global-sip-trunking-reach-to-japan/
GTT Expands Global SIP Trunking Reach to Japan | GTT
GTT Envision platform grows Asia capability for global SIP-based voice services
global sip trunkinggttexpandsreachjapan
https://newswire.telecomramblings.com/2026/01/gtt-expands-global-sip-trunking-reach-to-japan-2/
GTT EXPANDS GLOBAL SIP TRUNKING REACH TO JAPAN
global sip trunkinggttexpandsreachjapan