How to Set Up Microsoft Teams Phone for Your Houston Business

The Microsoft Teams Phone system is a cloud PBX built into the Teams app you already use for chat and meetings. It gives you a full business phone platform: direct-dial numbers, hold and transfer, voicemail, auto attendants, call queues, and softphone calling from a laptop or mobile. For most small and midsize offices in The Woodlands, Houston, and across Texas, it can retire an aging on-premise phone system entirely.

The single most important thing to understand: making external calls requires two separate pieces. You need (1) a Teams Phone (cloud PBX) license, and (2) a PSTN connectivity method that actually reaches regular phone numbers. The phone-system license by itself lets Teams users call each other, but it does not place a call to a customer's cell phone or the county clerk's office. Miss this and your "new phone system" can dial internally and nothing else.

Here is where most planning goes sideways, so let's make Teams Phone licensing concrete. The base add-on is called Teams Phone Standard. It is included at no extra cost in Microsoft 365 E5. If you are on E3, Business Basic, Business Standard, or Business Premium, you buy Teams Phone Standard separately as an add-on.

• Teams Phone Standard add-on: commonly cited around $8 to $10 per user per month as of mid-2026. Verify current Microsoft list pricing at purchase.
• Microsoft 365 E5: roughly $57 to $60 per user per month as a market range, and it bundles Teams Phone Standard plus Audio Conferencing.
• The old Business Voice bundle was retired for new purchases in mid-2022. You now assemble the same capability from parts: Teams Phone Standard, a PSTN connectivity method, and Audio Conferencing where you need dial-in numbers. Rebuilding that functionality lands near $20 per user per month total, paid in pieces.

Prices move constantly and vary by agreement, reseller, and market, so treat every figure above as a range, not a quote. The practical takeaway: if you are already on E5, most of this is paid for and you mainly need to add a calling path. If you are on Business Premium, budget for the add-on plus calling. A good Microsoft 365 managed services partner can model this against your existing subscription before you commit.

This is the fork in the road. There are three ways to connect Teams Phone to the public telephone network, and the right one depends on your size, call volume, and how much control you want.

Microsoft Teams calling plans

With Teams calling plans, Microsoft itself is your phone carrier. You buy numbers and manage porting directly in the Teams admin center, and there is no Session Border Controller (SBC) to run. This is the simplest path to deploy and a natural fit for a straightforward Houston office. The domestic Calling Plan add-on runs around $17 per user per month and includes a pooled 3,000 outbound minutes per user per month for US, UK, and Canada. A pay-as-you-go option sits near $13 per user plus metered usage. Third-party estimates put Microsoft Calling Plans in the $12 to $20 range depending on plan. Simple, but often the most expensive per user at scale.

Operator Connect

Operator Connect is a middle path. An approved third-party carrier provisions PSTN service directly inside the Teams Admin Center. The operator owns and runs the SBC infrastructure, you contract with that operator, and you assign numbers through Teams. You get an integrated experience and typically fast deployment with no SBC to manage. Per-user cost is carrier-dependent, so pricing varies by the operator you choose rather than being set by Microsoft.

Teams Phone direct routing

Teams Phone direct routing connects Teams to any SIP-capable carrier through an SBC that you, a partner, or your MSP manages. This is the flexible option: free choice of carrier, the ability to run multiple carriers, complex dial plans, and integration with an existing PBX, contact center, or analog devices. The tradeoff is that someone has to own the SBC. For many Texas businesses with a contact center or specialized call routing, Direct Routing wins, but it is best run by a partner who manages the SBC for you. If a unified communications strategy matters, our UCaaS and unified communications team can map this end to end, and our Teams Phone deployment services cover the SBC side directly.

The honest answer on Teams Phone vs traditional PBX: for most Houston-area offices already invested in Microsoft 365, yes. A legacy PBX ties you to on-site hardware, per-site maintenance, and separate mobility add-ons. Business VoIP with Microsoft Teams collapses phone, chat, video, and presence into one app and one identity, so a user's number and voicemail follow them anywhere. Where a traditional PBX still makes sense is heavy call-center environments with deeply customized routing or a large fleet of analog endpoints, and even then, Direct Routing plus SIP Gateway often bridges the gap without a forklift replacement. Compare the full stack against your current setup the way you would evaluate any core system, similar to how businesses weigh modern business phone systems against what they have.

You do not need to run softphone-only. Teams-certified device makers include Yealink, Poly (Polycom), AudioCodes, Crestron, and Lenovo, covering desk phones, conference phones, and meeting-room systems. Certification means the hardware meets Microsoft's performance, security, and compatibility standards, which matters when a provisioning failure means a phone that never registers.

For older gear, SIP Gateway is a native Teams service that connects compatible third-party SIP phones and, through analog telephone adapters, legacy analog devices like elevator phones, door phones, and overhead paging. That means the loudspeaker in your Spring warehouse or the elevator phone in a Sugar Land building can live on Teams without keeping a local PBX alive just to serve them.

Emergency calling is not optional and not automatic. Two federal laws govern it. Kari's Law requires direct 911 dialing with no prefix, plus a notification to designated on-site personnel whenever a 911 call is placed. RAY BAUM'S Act requires that a dispatchable location, meaning the street address plus specifics like floor, room, or suite, be conveyed to the answering point. Teams supports dynamic emergency calling, which determines a caller's location from network signals like subnet, switch port, and Wi-Fi access point, so the correct location updates as users move. That only works well on a network you have mapped properly, and remote or home workers need a confirmed emergency address on file. Configuring this correctly is a compliance requirement, not a nice-to-have.

Keeping your existing numbers means porting. You submit a port order with a signed Letter of Authorization, Microsoft acknowledges the request (typically within about 72 business hours), and then the timeline depends heavily on your losing carrier's responsiveness. Full completion can range from a few days to a few weeks. Do not promise a hard cutover date until the port is confirmed, and never disconnect old service before numbers land.

Great licensing and a bad network still equals dropped calls. Microsoft recommends connecting Teams phones and rooms to a wired network for stability. Readiness usually means Power over Ethernet, QoS marking so voice traffic is prioritized, VLAN segmentation to separate voice, and enough bandwidth (Microsoft suggests allocating roughly 100 kbps up and down per phone or call, adjusting down automatically when the link cannot sustain it). Skip these and you get poor audio and provisioning failures. This is exactly the kind of groundwork our Houston managed IT services team handles before a single phone ships.

Do I need a calling plan if I already have a Teams Phone license?

Yes. The Teams Phone license is the cloud PBX, but it does not connect you to outside numbers on its own. You must add a PSTN path: a Microsoft Calling Plan, Operator Connect, or Direct Routing. Without one, users can only call each other inside Teams.

How much does Teams Phone cost per user?

As a market range in mid-2026, plan on roughly $8 to $10 per user monthly for the Teams Phone Standard add-on (free with E5), plus a calling path. Microsoft Calling Plans commonly run $12 to $20 per user, while Operator Connect and Direct Routing pricing is carrier-dependent. Verify current Microsoft pricing before you budget.

Can I keep my current Houston phone number?

In almost all cases, yes. You port the number into Teams with a signed Letter of Authorization. Microsoft usually acknowledges within about 72 business hours, but full completion depends on your current carrier and can take days to weeks, so plan the cutover as a range, not a fixed date.

What about our old analog phones and paging system?

SIP Gateway plus analog telephone adapters can connect legacy analog devices such as elevator phones, door phones, and overhead paging to Teams Phone without keeping a local PBX. Certified desk and conference phones from vendors like Yealink and Poly cover the rest.

Is Teams Phone secure enough for a regulated business?

Teams Phone inherits Microsoft 365 identity and security controls, and pairing it with strong endpoint and access management makes it suitable for many regulated Texas businesses. We often layer it alongside managed Microsoft 365 hardening and access controls rather than treating voice as a separate silo.

Teams Phone rewards businesses that plan the licensing, calling path, e911, and network before flipping the switch, and it punishes the ones that do not. If you want a Houston or The Woodlands partner with 20+ years of experience and 100% Texas-based support to scope and run the whole thing, explore our Microsoft Teams Phone deployment services and let's map the cleanest path for your business.