How a Spanish Telecom Operator Runs 500+ Daily Outbound AI Calls on Yeastar with 5 Languages
A CNMC-registered Spanish telecom operator, already providing cloud PBX, SIP trunks, MPLS, fibre, 5G, IoT connectivity, and AI-powered call recording to businesses across Spain, deployed 10 VoiceInfra AI agents on Yeastar PBX via extension-based registration. They run 500+ outbound calls daily across lead generation, follow-ups, surveys, and appointment setting, achieving 30%+ transfer rates in Spanish, Arabic, English, French, and Portuguese, serving clients across Spain, LATAM, Middle East, and North Africa.
10
AI Agents on Yeastar
Each running its own outbound campaign with dedicated phone number
500+
Daily Outbound Calls
Across lead gen, follow-ups, surveys, and appointment setting
30%+
Transfer Rate
AI-qualified calls transferred to human agents with full context
5
Languages
Spanish, Arabic, English, French, Portuguese across 4 markets
The Challenge
The operator already had a strong practice as a CNMC-registered fixed, fibre, and mobile operator serving businesses across Spain with cloud PBX, SIP trunks, MPLS, fibre, 5G, IoT, and AI-powered call recording. Their business clients were asking about AI: can the phone system answer calls automatically, qualify leads, handle after-hours inquiries? The operator had already embraced AI in their call recording portal with transcription and analytics, adding AI voice agents was the natural next step.
They needed to run large-scale outbound calling campaigns for clients across Spain, LATAM, Middle East, and North Africa. Manual outbound calling was slow, expensive, and inconsistent. They needed a platform that could handle 500+ daily calls across 5 languages with intelligent call transfer to human agents when prospects were qualified. Multiple campaigns had to run simultaneously, each with its own phone number, script, and CRM integration.
Building an AI voice agent platform from scratch was not viable. They needed a proven platform that would layer on top of their existing Yeastar PBX deployments without requiring new hardware, carrier changes, or disruption to client phone systems, and that could be packaged as a resellable add-on alongside their existing telecom services.
The Solution
The operator deployed 10 VoiceInfra AI agents on their existing Yeastar PBX using extension-based registration. Each AI agent runs its own outbound campaign independently, lead generation, follow-ups, surveys, and appointment setting, with its own phone number, script, and target list. The same Yeastar PBX platform their business clients already use for cloud PBX and SIP trunk services.
AI agents make over 500 outbound calls daily across all campaigns. When a prospect is qualified or requests human assistance, the AI transfers the call to the appropriate human agent with full conversation context, including transcript, lead qualification status, and caller details.
All AI agents operate in 5 languages, Spanish, Arabic, English, French, and Portuguese, serving clients across Spain, LATAM, Middle East, and North Africa. Campaigns are configured per language and per market, with localized scripts and call handling procedures.
The operator packaged VoiceInfra AI agents as an add-on to every cloud PBX, SIP trunk, and connectivity proposal: AI Inbound Agents for 24/7 call answering, AI Outbound Agents for campaigns and reminders at the scale they've already proven (500+ calls/day), Call Transcription with auto-logging, and Voicemail Transcription with intent detection. This sits alongside their existing AI-powered call recording portal, creating a complete AI voice suite for Spanish businesses, AI that listens to calls and AI that handles calls.
Outcomes
500+ daily outbound calls across 10 AI agents on Yeastar
Each of the 10 AI agents runs its own campaign, lead generation, follow-ups, surveys, appointment setting, with its own phone number and script. All on the same Yeastar PBX the operator already uses for cloud PBX services.
30%+ transfer rate to human agents
Over 30% of AI-handled calls transfer to human agents with full conversation context. The AI qualifies and engages prospects at scale, and humans only step in for warm, qualified leads.
Expanded from telecom operator to telecom plus AI
Every cloud PBX, SIP trunk, and connectivity client can now add AI voice agents as an upsell. The operator differentiated from competitors who offer only connectivity and PBX without AI.
5-language, 4-market operation from Madrid
AI agents operate in Spanish, Arabic, English, French, and Portuguese, serving clients in Spain, LATAM, Middle East, and North Africa from a single Yeastar + VoiceInfra deployment.
Looking Ahead
The operator is adding more AI agents to their Yeastar PBX, expanding from 10 to 15+ agents for additional campaigns. New language support is being added for Italian and German markets. Campaign analytics and real-time monitoring dashboards are being integrated with their existing CRM platforms. Industry-specific workflows are being developed: appointment booking for healthcare clinics, property inquiry handling for real estate agencies, and client intake for legal practices across Spain.
Key Takeaways
10 AI agents, one Yeastar PBX, at operator scale
A CNMC-registered operator deployed 10 VoiceInfra AI agents on their existing Yeastar PBX via extension-based registration. Each agent runs its own campaign, phone number, script, and transfer logic. No new hardware, no carrier switch.
500+ calls daily at 30%+ transfer rate proves AI outbound works
AI outbound campaigns at operator scale. 500+ daily calls with 30%+ transfer rate means AI effectively qualifies prospects before human agents step in. The operator runs this for their own clients and packages it as a resellable service.
Multi-language AI agents open global markets from Spain
Spanish, Arabic, English, French, and Portuguese, AI agents operate across European, LATAM, and Middle Eastern markets from a single Yeastar + VoiceInfra deployment in Madrid.
AI recording plus AI agents completes the voice AI suite
The operator already offered AI-powered call recording with transcription and analytics. Adding VoiceInfra AI voice agents on the same Yeastar infrastructure completed the picture: AI that listens to calls and AI that handles calls, resold to every business client.
Features That Made This Possible
Frequently Asked Questions
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