What is Microsoft Teams Phone and how does it work?

Microsoft Teams Phone is a cloud-based PBX replacement built into Microsoft Teams. It replaces your existing business phone system with a phone system that lives entirely within the Teams app your staff already uses — including auto-attendant, call queues, call recording, voicemail, hold music, call transfer, direct inward dialing, and mobile calling through the Teams app. To make and receive calls to external phone numbers, Teams Phone requires either a Microsoft Calling Plan or Direct Routing through a SIP trunk provider.

What Microsoft 365 plan do I need for Teams Phone?

Teams Phone System is included in Microsoft 365 Business Voice and available as an add-on (approximately $8/user/month) to Business Basic, Standard, and Premium. To make external calls, you also need a Microsoft Calling Plan (approximately $12/user/month) or Direct Routing through your own SIP trunk. Total incremental cost for a business already on M365 Business Premium: approximately $20-22/user/month for full calling capability.

What is Direct Routing for Microsoft Teams Phone?

Direct Routing connects Teams Phone to an external SIP trunk provider rather than using Microsoft's Calling Plan as the carrier. It requires a Session Border Controller (SBC) to bridge your SIP trunk to Teams Phone. Direct Routing offers more carrier flexibility and typically lower calling costs at volume — but is more complex to configure. For most small businesses under 50 seats with average call volumes, Microsoft Calling Plan is simpler. Direct Routing makes sense at higher volumes or when an existing SIP trunk contract has significant time remaining.

Is Microsoft Teams Phone worth it for a small business?

Teams Phone is worth it if: your staff already uses Teams daily for chat and video; you're already on Microsoft 365 Business and want to consolidate communications; and you have a Microsoft-aligned IT provider for the configuration. It is not worth it if staff doesn't actively use Teams (they won't adopt it for calls either), or if your call volume needs advanced call center features that 3CX handles better.

Microsoft Teams Phone for Florida Small Businesses — What It Costs, What It Does, and Whether It's Worth It

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Communications

Microsoft Teams Phone for Florida Small Businesses — What It Costs, What It Does, and Whether It's Worth It

July 11, 20268 min readSteve Condit — Founder, Simply IT

Communications

If your Florida business is already on Microsoft 365 and your staff uses Teams for chat and video every day, the logical question is why you're also paying for a separate phone system. Microsoft Teams Phone answers that question by turning Teams into your complete business phone system — auto-attendant, call queues, voicemail, mobile calling, all in the app your team already has open. Whether it's the right move depends on how deeply your team actually uses Teams, your current per-user economics, and whether your IT setup can handle the configuration. This guide gives you the numbers and the honest trade-offs.

~$8

Teams Phone System add-on per user/month

~$12

Microsoft Calling Plan per user/month

2-4 wks

Typical deployment timeline for SMB

1 app

Teams replaces chat, video, AND phone

Calling Plan vs. Direct Routing — Which Setup Is Right?

	Calling Plan	Direct Routing
How it works	Microsoft is your carrier — calls route through Microsoft's PSTN	Your existing SIP trunk connects to Teams via a Session Border Controller
Setup complexity	Simple — managed in M365 admin center	Complex — requires SBC hardware/software and SIP trunk config
Cost per call	Flat $12/user/month domestic unlimited	Your SIP trunk rates — typically lower per-minute at volume
Best for	Businesses under 50 seats with average call volumes	High-volume callers or businesses with an existing SIP contract
Carrier flexibility	Locked to Microsoft as carrier	Use any certified SIP trunk provider
IT expertise required	M365 admin experience sufficient	M365 admin + SBC/SIP configuration expertise

What You Need in Place Before Deploying Teams Phone

A qualifying Microsoft 365 plan

Teams Phone System is included in Microsoft 365 Business Voice and available as an add-on to Business Basic, Standard, and Premium. If your business is not on Microsoft 365, factor in the full M365 plan cost — though most businesses switching to Teams Phone are already M365 subscribers looking to consolidate a separate phone system.

Network QoS configuration

Teams Phone call quality is sensitive to network conditions because voice traffic shares bandwidth with Teams video, SharePoint sync, and general internet usage. Quality of Service (QoS) configuration on your router — which prioritizes Teams voice traffic — is not optional for a business-quality deployment. A Teams Phone installation without QoS will work most of the time and produce call quality complaints on the days it doesn't.

Auto-attendant and call queue planning before go-live

The auto-attendant configuration is what callers experience when they dial your main number. Plan your call routing tree — main greeting, department options, after-hours routing, overflow handling — before the number ports. A 30-minute planning session with your IT provider before deployment saves hours of reconfiguration after.

Staff training on phone features in Teams

Staff who already use Teams for chat and video adopt Teams Phone faster — but still need specific training on call transfer, voicemail access, availability status, and the mobile app. A 45-minute training session before go-live reduces day-one support calls significantly. The most common Teams Phone failure in SMB deployments is not a configuration error — it's adoption failure from skipped training.

// Did You Know?

Businesses that deploy Teams Phone without training staff on call transfer, voicemail, and availability settings end up with staff routing calls by walking across the office, because they don't know how to use the transfer button. The platform is capable; the gap is always the 45 minutes of training that didn't happen before go-live. Simply IT includes structured Teams Phone training as a standard part of every deployment.

// Key Takeaway

Teams Phone is worth it for Florida businesses that are already living in Microsoft 365 and want to eliminate a separate phone system app. The incremental cost is manageable, the feature set is complete, and the consolidation benefit is real — when it's set up correctly with QoS, a planned auto-attendant, and staff training. Simply IT deploys and supports Microsoft Teams Phone for North Central Florida businesses as part of a full Microsoft 365 managed services relationship.

// Related Reading

→ 3CX vs RingCentral vs Microsoft Teams Phone — Which Business Phone System Is Right for You?→ Microsoft Copilot for Florida Small Businesses — What It Does, What It Costs, and Whether It's Worth It → Best Business VoIP Phone System for Florida Small Businesses 2026 — A Practical Comparison

Schedule a Free Teams Phone Assessment →

// Written By

STEVE CONDIT

Founder & Owner, Simply IT · US Marine Veteran · 30+ Years IT Experience

Steve Condit founded Simply IT to bring enterprise-grade IT management to small and mid-sized businesses across North Central Florida. With over 30 years of IT experience and a background in the US Marine Corps, Steve built Simply IT around the principle that local businesses deserve the same quality of technology partnership that large companies take for granted — without long-term contracts or national call center support.

Full Bio →LinkedIn →About Simply IT →