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CMS Group Ltd

Technology Management Consultancy. Technology, run with intent. Since 1990.

0203 404 4700hello@cms-group.net
United Kingdom

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  1. Services
  2. /
  3. Modernise
  4. /
  5. Voice & Communications

Modernise

Voice & Communications

Teams Phone, calling plans, and unified communications

Microsoft Teams Phone and unified communications: migration from legacy PBX or ISDN, design of auto attendants and call queues, number porting and cutover, and ongoing voice service management. We help you move to cloud voice with minimal disruption and maximum control.

Cloud-First StrategyOperational ExcellenceRemote & Hybrid Work
Discuss Voice & CommunicationsAssess strategic maturity

Available in:

LondonManchesterBirminghamLeedsBristolEdinburgh+ nationwide

Teams Phone

Native M365 voice

Flexible

Calling Plans / Operator Connect / Direct Routing

Managed

Ongoing support and changes

Challenges We Solve

  • Legacy phone system costly or end-of-life
  • ISDN switch-off and migration pressure
  • Need for integrated voice and collaboration
  • Complex number porting and cutover
  • Ongoing voice support and change requests

Our Approach

We design and deliver Teams Phone solutions using Calling Plans, Operator Connect, or Direct Routing—matching the right model to your needs. From auto attendants and call queues to number porting and cutover management, we ensure a clean transition and ongoing support.

What You Get

  • Dedicated support team
  • Full visibility via CMS Strata
  • Regular service reviews
  • Proactive recommendations

Also in this area

Specific Solutions

Within Voice & Communications, we offer the following solutions calibrated to different operating contexts.

Teams Phone Migration

Calling Plans, Operator Connect, or Direct Routing

End-to-end migration to Microsoft Teams Phone: choice of Calling Plans, Operator Connect, or Direct Routing; design of voice topology; and cutover with number porting and user readiness.

Key Features

  • Model selection — Calling Plans, Operator Connect, or Direct Routing
  • Voice topology — Design for your sites and resilience
  • Number porting — Port existing numbers with minimal downtime
  • Cutover planning — Phased or big-bang migration
  • User readiness — Training and adoption support

Ideal For

Organisations moving from legacy PBX or ISDN to Teams Phone.

Microsoft Teams Phone
Project-based
Learn more

Auto Attendants, Call Queues & Switchboard Design

Professional call handling in Teams

Design and configuration of auto attendants, call queues, and switchboard-style routing so callers reach the right people and teams without delay.

Key Features

  • Auto attendants — IVR and menu options
  • Call queues — Queue and overflow rules
  • Switchboard design — Reception and hunt groups
  • Business hours — Schedules and after-hours handling
  • Reporting — Call volume and queue metrics

Ideal For

Organisations requiring structured call routing and reception in Teams.

Microsoft Teams Phone
Project-based
Learn more

Number Porting & Cutover Management

Seamless number migration and go-live

Number porting from existing provider to Teams Phone or Operator Connect, plus cutover planning and execution so voice service continues with minimal disruption.

Key Features

  • Port coordination — Liaison with losing and gaining carriers
  • Cutover schedule — Date and window planning
  • Fallback planning — Contingency if port delayed
  • Go-live support — On-the-day support and verification
  • Documentation — Port and configuration records

Ideal For

Organisations porting existing numbers into Teams or Operator Connect.

Project-based
Learn more

Ongoing Voice Service Management & Support

Day-two support and change management

Ongoing management of your Teams Phone or unified communications: user changes, number amendments, queue and attendant updates, and fault escalation with carriers.

Key Features

  • User and number changes — Add, move, change
  • Queue and attendant updates — Config changes as business evolves
  • Carrier escalation — Fault and quality issues
  • Reporting — Usage and quality metrics
  • Renewals — Contract and licence oversight

Ideal For

Organisations with Teams Phone or UC already in place needing managed support.

Microsoft Teams Phone
Per user/month
Learn more

See How We've Helped

Discover how we've delivered results for organisations like yours across our service areas.

View case studies

See how we help your industry

FinanceHealthcareHospitalityLegalManufacturing

Related Service Areas

Microsoft 365 & Azure

Cloud productivity and infrastructure, expertly managed

Cloud Infrastructure

Modern infrastructure for modern business

Network & Connectivity

The backbone of your digital operations

Ready to run with intent?

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