Enterprise voice modernization. From legacy to AI-native.
Voice over IP solution combining 1-TO-ALL Business DID & SIP Trunk infrastructure, Super Number AI voice intelligence, Zoom Phone deployment via Platinum Partner channel, and PBX integration services. Built on Thailand's NBTC Type 3 voice carrier infrastructure.
Most Thai enterprises are mid-transition between legacy and modern voice.
Most Thai enterprises operate hybrid voice environments — legacy TDM/PRI infrastructure for some functions, SIP trunking for others, on-premise PBX for some sites, cloud PBX or Zoom Phone for others. The transition from legacy voice to modern voice rarely happens as a single project. It happens as a multi-year program of incremental modernization, with the operational complexity that creates: multiple voice infrastructure layers, multiple vendor relationships, multiple billing structures, and uncertain accountability when something fails across the boundary.
1-TO-ALL operates Voice over IP as a solution category covering the full voice modernization journey. Business DID & SIP Trunk for SIP carrier infrastructure under NBTC Type 3 license. Super Number for AI voice intelligence layer on existing voice. Zoom Phone for cloud-native enterprise voice through 1-TO-ALL Platinum Partner #1 Asia channel. phone11 (Coming 2027) for full AI Cloud PBX architecture. Plus PBX integration services and voice migration services for enterprises moving from legacy infrastructure. One operator across the modernization journey rather than vendor-juggling between voice carriers, PBX vendors, and cloud voice providers.
For Thai enterprises planning voice modernization, the question is whether the vendor can deliver carrier infrastructure AND modern voice platform AND AI voice intelligence AND migration services under one accountability surface. The 4,500+ Thai enterprise voice deployments operating today across Business DID & SIP, Super Number, Zoom Phone, and other voice products provide that combined capability under one Thai operator with NBTC Type 3 standing.
Five components in 1-TO-ALL's Voice over IP solution.
NBTC Type 3 SIP routing.
Foundational voice carrier infrastructure — Thai DID numbers issued under 1-TO-ALL's NBTC Type 3 license, SIP trunking on own network, carrier interconnection with Thai mobile and fixed networks.
Explore Business DID & SIP →Production AI voice today.
AI voice attach providing call summarization, transcription, sentiment analysis, and follow-up reminders on existing voice infrastructure. Available today on Business DID & SIP or Zoom Phone deployments.
Explore Super Number →Zoom Phone via Platinum Partner.
Zoom Phone deployments through 1-TO-ALL's Zoom Platinum Partner #1 in Asia channel. Routed through 1-TO-ALL's NBTC Type 3 SIP infrastructure. Optional Super Number AI attach available.
Explore Zoom by 1-TO-ALL →Future AI-native voice platform.
phone11 enterprise voice platform combining AI Cloud PBX, contact center, and AI summarization. Currently in hardening with selected enterprise pilots. Public launch 2027 on same NBTC Type 3 voice infrastructure.
Explore phone11 →Voice migration professional services.
Voice migration services for legacy-to-modern transitions — TDM to SIP migration, legacy PBX to cloud PBX migration, multi-site voice consolidation, number portability, and PBX integration. ISO 27001 + ISO 9001:2015 implementation methodology.
Explore Professional Services →Four common modernization paths.
Migrating from legacy TDM/PRI infrastructure to SIP trunking — keeping existing PBX systems while modernizing the carrier connectivity layer. Number portability, gradual migration, and operational continuity throughout transition.
Migrating from on-premise PBX infrastructure to cloud voice (Zoom Phone or phone11 when launched). Multi-phase migration combining carrier infrastructure modernization with platform modernization. Common for enterprises refreshing aging PBX hardware.
Adding AI voice intelligence to existing voice infrastructure without replacing it. Super Number attaches to existing Business DID & SIP or Zoom Phone deployments. Production AI capability available immediately without infrastructure migration.
Multi-year voice modernization toward AI-native architecture — combining today's production AI capability (Super Number) with future AI Cloud PBX architecture (phone11 Coming 2027). Roadmap-aligned modernization for enterprises planning 2-4 year voice transformation.
Celestica Thailand · 5,000-seat enterprise voice.
1-TO-ALL's largest single voice deployment.
Celestica Thailand's manufacturing operations center runs on 1-TO-ALL's largest single enterprise voice engagement — 5,000 seats with global operational standards, Thai data residency, and AI-enhanced call handling for production line coordination. Demonstrates 1-TO-ALL voice infrastructure operating at multinational manufacturing enterprise scale.
Ready to plan voice modernization for your enterprise?
Connect with the Voice over IP team for voice solution consultation, modernization roadmap planning, AI voice attach evaluation, and migration program structuring.
For enterprises planning voice modernization
VoIP solution consultation, voice carrier infrastructure planning, AI voice attach evaluation, Zoom Phone deployment scoping, and multi-year voice modernization roadmap planning.
Talk to VoIP team →For voice migration programs
Legacy voice migration programs including TDM to SIP, on-premise PBX to cloud voice, multi-site voice consolidation. Migration program structuring with operational continuity throughout transition.
Migration program inquiries →