Leading Business VoIP & SIP Trunk Specialists

One of the World's Leading SIP Trunk Specialists

Blue Telecoms provides free SIP trunking with unlimited concurrent channels and built-in PSTN failover. Our service is a flexible, modern alternative to traditional ISDN lines — delivering superior call quality at a fraction of the cost.

With per-second billing and no minimum call charges, you only ever pay for what you use. Whether you're connecting a single SIP phone, a full PBX system, or VoIP software, our SIP trunks are designed to work seamlessly with your existing infrastructure.

We support PBX equipment, individual SIP phones, VoIP software, NAT traversal, voice encryption, and mobile access — giving you complete flexibility in how you deploy your telephony.

Voice Encryption & Government-Grade Security

Security is paramount in business communications. Blue Telecoms SIP trunks support high-strength voice encryption, making them suitable for even the most security-conscious organisations, including government and public sector operations.

Our encryption ensures that your voice traffic is protected from eavesdropping and interception across the entire call path. Combined with our secure UK-based infrastructure, you can be confident that your communications are private and compliant.