We don't just sell products. We solve problems.
CTS is not a telecom operator — we are your technical and business consultant in China. We help global enterprises navigate the unique challenges of deploying VOIP, SIP trunking, and Microsoft Teams Direct Routing in one of the world's most regulated telecom markets.
Whether you are a CTO in London, an IT manager in Shanghai, or a vendor trying to connect your global client's China office — we are the local arm that gets things done.
"Over 20 years in this industry, I've seen too many multinational companies struggle because they don't understand China's business rules. I founded CTS to help them navigate those rules using local know-how."
How We Help
We focus on three areas where global companies most often get stuck in China:
Technical Configuration
SBC setup, SIP server integration, Teams Admin configuration, dial plans, gateways, and full network architecture.
Business & Communication
Direct communication with China Telecom, China Unicom, and China Mobile. Contract negotiation, documentation, and real-name authentication.
End-to-End Solutions
From new numbers and cloud PBX to full office migrations — on premise, cloud, hybrid, or anything in between.
What Can We Help You With?
If any of these sound familiar, you're in the right place:
- Need a China local DID number, but don't know who to contact or how to apply?
- Microsoft Teams Direct Routing setup is stuck halfway and your SBC won't connect?
- You want to port an existing number, but your carrier's account manager says "it can't be done"?
- Your headquarters CTO sent you a list of SIP parameters that don't match your local provider's documentation?
- You are a global service provider looking for a reliable local partner to provide compliant China numbers for your clients?
- You want to reduce international call costs, but need a legal and stable solution in China?
No matter how small or complex your question is — send us a message. We respond within 24 hours.
Related Services
- SIP Trunking — Get local China DIDs
- Microsoft Teams Direct Routing — Connect Teams to China PSTN
Have a VOIP problem in China?
Talk to us. We'll help you figure out the best path forward.
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