Key benefits
SIP Voice delivers flexible business telephony designed to replace ISDN and support modern IP environments. It's enterprise‑grade SIP Voice built for growth.
Scales as your business grows
Increase or reduce concurrent call capacity without new lines or disruptive site visits designed to help voice services scale.
Lower total cost than ISDN
Simplify voice infrastructure using IP delivery over Ethernet or the internet, which may reduce hardware, maintenance, and ongoing costs.
Supports high‑quality, reliable calls
Business-grade voice delivered over a carrier-grade network, designed to support consistent call quality for critical communications.
Flexible deployment options
Support traditional SIP trunking, over‑the‑top connectivity, or direct routing for Microsoft Teams Phone environments.
Future‑ready voice platform
Designed for
SIP Voice is designed for organisations transitioning away from legacy voice services or modernising their telephony environment
Multi‑site businesses requiring scalable call capacity
Built to support seamless, reliable communication across locations, with the flexibility to scale as business needs evolve.
Organisations using IP‑PBX, cloud PBX or Microsoft Teams Phone
Integrates with supported and existing IP-PBX, cloud PBX, and Microsoft Teams environments for flexibility.
Organisations with growing call volumes and evolving voice requirements.
Designed to support increasing demand and more complex communication needs.
Enterprise organisations replacing ISDN services
Supports a seamless transition from legacy ISDN to scalable, IP-based voice, improving flexibility, performance, and long-term efficiency.
Frequently Asked Questions
SIP Voice connects your business phone system to the public phone network using IP rather than traditional ISDN lines
Yes. SIP Voice is designed to replace ISDN services and support greater scalability and flexibility.
In most cases, existing phone numbers can be ported.
Yes. SIP Voice supports direct routing to Microsoft Teams Phone.
Concurrent call capacity depends on the number of SIP sessions selected and available bandwidth.
SIP Voice is delivered over business‑grade networks using the G.711 codec to support high call quality.