Unlock the full value of Microsoft Teams Phone
Resonate enables organisations to go beyond basic calling, transforming Microsoft Teams calling into a connected, insight-driven capability. By unifying voice, collaboration, and customer interaction, we help you unlock the full value of communications turning every conversation into competitive advantage.
The Challenge
Microsoft Teams Phone systems can fall short without the right strategy
Disconnected collaboration and voice
While Teams is widely adopted, many organisations still rely on separate telephony platforms, limiting the value of true Microsoft Teams collaboration.
Legacy infrastructure and PSTN switch-off
Ageing PBX systems and network shutdowns create cost, risk, and urgency to modernise your voice estate.
Complexity & legacy integration
Voice environments are often poorly understood, making central transformation difficult, also technical or commercial constraints mean legacy systems cannot always be removed requiring secure integration with Microsoft Teams rather than full replacement.
Scalability & flexibility
Modern organisations need globally scalable, cost-effective voice solutions that adapt to changing demand. At the same time, hybrid working requires seamless communication across any device and location, without compromising customer experience, or call quality.
The value of an integrated Microsoft Teams Phone system
Seamless Calling
Enable seamless internal and external calling across all devices and locations.
Teams Modernisation
Replace legacy systems with the flexibility of Teams Phone.
Trusted Connectivity
Deliver secure, scalable voice with certified Microsoft Solutions Partner
Enterprise Resilience
Benefit from fully redundant, enterprise-grade SIP trunking with global reach and regulatory assurance.
Voice Intelligence
Gain control and visibility with a tailored Teams voice solution – unlocking insight from conversations across your Teams business calling environment.
A Microsoft Teams Phone system from Resonate, the voice experts
Teams Phone enables organisations to make, receive, and manage calls directly within Teams — Resonate can help you bring external voice into the platform alongside collaboration and workflow.
We provide options to connect your environment to the public telephone network using the approach that best fits your business — including:
- Microsoft Teams Direct Routing built on our Voice for Teams platform
- Operator Connect – delivered with partners in the UK and globally
- Hybrid solutions – Resonate experts design deliver and support mixed modality and mixed platform voice solutions including integration with legacy and on-prem estates
As a specialist Teams Phone provider, we enable you to retain existing numbers, integrate legacy systems, and scale globally while delivering seamless Microsoft Teams calling across devices. With full support for SIP, bring-your-own-carrier, and enterprise-grade infrastructure, your voice environment becomes more flexible and resilient.
Resonate delivers an end-to-end solution from discovery of the legacy estate through to design, deployment and support from our dedicated 24 x 7 x 365 support centre
The result is a fully integrated Teams solution that transforms communication into a strategic business asset.
The evidence
Enterprise voice expertise you can rely on
1 million +
users migration
> 1 billion
VoIP minutes managed globally
100+
countries deployed and supported
01What is a Microsoft Teams phone system?
A Microsoft Teams phone system is a cloud-based telephony platform that allows users to make and receive calls within Teams, replacing traditional PBX systems.
02Can Microsoft Teams replace my existing phone system?
Yes — Microsoft Teams calling can replace or integrate with legacy systems, enabling a modern teams business calling environment.
03Why do I need a Teams Phone provider?
A teams phone provider enables external calling, number management, and voice services required to fully operationalise a Microsoft Teams phone system.
04What is the best teams voice solution UK organisations should consider?
The right teams voice solution UK depends on your organisation’s needs. Many businesses choose microsoft direct routing via a trusted direct routing provider UK for greater flexibility and control.
05What is Microsoft Teams direct routing?
Microsoft direct routing connects your Teams environment to the public telephone network through a third-party provider, enabling full Microsoft Teams calling capabilities.
06What are the benefits of Teams Direct Routing compared to Operator Connect?
Direct Routing provides greater flexibility for carrier selection, call routing, number management and integration with existing telephony platforms, making it popular with larger enterprise organisations.
07Do I need an SBC for Microsoft Teams Phone?
An SBC is required for Direct Routing deployments. Organisations using Operator Connect do not require their own SBC infrastructure.
08What is SIP trunking and how does it work with Microsoft Teams?
SIP trunking connects your Microsoft Teams phone system to the public telephone network via an internet-based service, enabling external calling. When combined with microsoft direct routing, it allows organisations to retain control of carriers, numbers, and call routing while enabling full Microsoft Teams calling capabilities.
09Why is SIP trunking important for a teams voice solution?
SIP trunking provides the scalability, flexibility, and global connectivity required for a modern teams voice solution UK. It enables organisations to replace legacy telephony, support international calling, and deliver resilient, enterprise-grade voice services within a Microsoft Teams phone system.