Teams Phone or Zoom Phone: which business phone system fits us?

Key facts

• Teams Phone connects to the phone network through Calling Plans, Operator Connect or Direct Routing.
• Zoom Phone offers Zoom-provided calling service and bring-your-own-carrier options.
• Both support auto attendants, call queues, voicemail and certified desk phones.
• US emergency calling rules apply to both and need location setup.
• Number porting timelines depend on the losing carrier, so plan them early.

The short comparison

Teams Phone and Zoom Phone are both cloud PBX services. Each replaces an on-site phone system with software-defined call routing, numbers and voicemail that work on desktops, mobile apps and desk phones. The biggest practical difference is where users spend their day: in Teams or in Zoom.

The table covers stable, high-level differences. Check current features and licensing with each vendor before you buy.

When Teams Phone is the better fit

• Your staff already chat and meet in Teams every day.
• You want one admin model and one identity system for calling and Microsoft 365.
• You need flexible carrier options, including keeping a preferred carrier through Operator Connect or Direct Routing.
• You want calling, voicemail and call recordings governed by Microsoft 365 policies.
• You own Microsoft 365 E5 or are buying Teams Phone with other Microsoft licensing.

When Zoom Phone is the better fit

Zoom Phone is a capable system. If people already work in Zoom, asking them to make calls from a different app can hurt adoption. In that case Zoom Phone may simply be the better fit.

• Zoom is your standard for meetings and most users rarely open Teams.
• You want a simple, all-in-one setup from one vendor for meetings and calling.
• Your productivity suite is not Microsoft 365, or Teams is not widely used.
• Your team already knows the Zoom admin portal.
• You plan to use Zoom's contact center products with your phone system.

What to plan with either system

The platform is only part of the project. Most of the effort goes into numbers, call flows, emergency calling and devices. Start with an inventory of every number, who answers it, and what happens after hours and on holidays.

US emergency calling rules under Kari's Law and RAY BAUM'S Act apply to cloud phone systems. Both platforms support dispatchable location, but you must configure addresses, sites and network locations correctly and test them.

• List every number, including fax lines, alarm lines and elevator phones.
• Redesign call flows instead of copying old PBX menus.
• Plan emergency addresses and network locations for each site.
• Choose devices and confirm they are certified for your platform.
• Schedule number ports early, since carriers set the pace.

Moving to Teams Phone

If Teams Phone is the choice, decide how you will connect to the phone network. Calling Plans are the simplest. Operator Connect lets you buy service from a participating carrier through the Teams admin center. Direct Routing connects Teams to a carrier through a certified session border controller and suits complex or multi-site needs.

Roll out site by site. A pilot site first lets you test call flows, devices and emergency calling, then larger sites follow. The schedule depends on site count, porting and device delivery and is set after discovery.

How Accred Consulting approaches it

Accred Consulting helps you compare Teams Phone with the system your people already use and decide with real call flow and site data. When Teams Phone is the right fit, Accred designs and deploys it: discovery inventories numbers, call flows, sites and devices, and the proposal sets scope, pricing and timeline. US-based specialists choose the PSTN connection, build auto attendants and queues, configure emergency calling, port numbers and roll out site by site. Handover includes documentation and knowledge transfer.

Track record: 475+ client projects, 2,000+ migration workstreams and 210,000+ users migrated by a US-based team. Company facts · Case studies

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