Microsoft Teams Direct Routing Service for UK Businesses
AMVIA delivers this service as part of our managed IT portfolio for UK businesses. Fixed monthly pricing, no hidden fees, and a team that understands your business.
Teams Direct Routing connects Microsoft Teams to the public telephone network via a certified SBC — enabling UK businesses to use existing telephone numbers and call minutes within the Teams interface. AMVIA designs and manages Direct Routing deployments, providing competitive UK call rates, geographic number retention, and full Teams Phone System configuration.
Why This Matters
What's Included
Everything you get with this managed service.
Proactive Protection
Continuous monitoring and threat detection to prevent incidents before they impact your business.
Expert Management
UK-based engineers handle configuration, updates, and incident response — so you don't have to.
Regular Reporting
Monthly reports on security posture, incidents handled, and recommended improvements.
Dedicated Support
Direct access to your account team for questions, changes, and escalations.
How We Set Up Teams Direct Routing
From SBC configuration to live PSTN calls — Direct Routing operational within 1–2 weeks.
SBC & Trunk Setup
We provision SIP trunks and configure the Session Border Controller to connect your carrier to Microsoft Teams.
Number Porting
Your existing phone numbers are ported to the new SIP trunk — we manage the process end-to-end with your carrier.
Call Routing & Policies
Voice routing policies, dial plans, and emergency calling are configured to handle all call scenarios correctly.
Testing & Go-Live
End-to-end call testing across internal, external, and international scenarios — followed by phased rollout to your team.
Why Choose AMVIA for Microsoft Teams Direct Routing
UK-based specialists delivering measurable results for businesses of every size.
Sheffield-Based, UK-Focused
Our engineering and support team operates from Sheffield. We understand UK compliance requirements, network infrastructure, and the specific challenges facing British businesses.
Accredited & Certified
AMVIA holds Cyber Essentials Plus, ISO 27001, and Microsoft Gold Partner status — giving you confidence that our services meet the highest UK security and quality standards.
1,200+ UK Businesses Protected
We manage IT and security for over 1,200 UK businesses across sectors including legal, finance, healthcare, and professional services. Our track record speaks for itself.
Fast, Responsive Support
Critical issues are responded to within one hour. Our helpdesk is available by phone, email, and portal — with dedicated account managers who know your environment.
Client testimonial coming soon — AMVIA protects over 1,200 UK businesses.
— AMVIA Client
Get Started
Fixed monthly pricing. No lock-in contracts.
Frequently Asked Questions
A Session Border Controller (SBC) sits between your Microsoft Teams environment and the PSTN carrier, handling call routing, security, and protocol translation. It ensures calls flow reliably between Teams and the public telephone network. AMVIA deploys certified SBCs either as physical appliances on your network or as cloud-hosted instances, depending on your infrastructure and resilience requirements.
Yes. Direct routing gives you complete freedom to select any UK PSTN carrier or SIP trunk provider, unlike Microsoft Calling Plans which lock you into Microsoft's telephony service. Teams Phone has surpassed 26 million PSTN users worldwide (UC Today), and direct routing is the preferred option for businesses that want competitive call rates, geographic number ranges, or existing carrier relationships.
The SBC uses configurable routing rules to direct inbound and outbound calls through specified carriers based on number ranges, cost, or failover logic. AMVIA configures least-cost routing to minimise your call charges and sets up failover paths so calls automatically switch to a backup carrier if the primary trunk fails, ensuring uninterrupted telephony.
AMVIA plans the migration in phases: first provisioning the SBC and SIP trunks in parallel with your existing PBX, then porting numbers and routing calls through Teams. During the transition, both systems run simultaneously so there is no loss of service. The UK PSTN switch-off is scheduled for completion by January 2027 (Openreach), making migration from legacy PBX systems increasingly urgent.
Yes. Direct routing supports centralised or distributed SBC deployments, making it well suited to multi-site organisations. A single SBC can route calls for all sites, or local SBCs can provide resilience at each location. AMVIA designs the topology based on your site count, call volumes, and failover requirements, ensuring consistent call quality and reliability across every office.
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