Your phone system needs to handle ordinary work well: answering a customer, transferring a call, covering reception during lunch and reaching someone working away from the office. When it’s time for a replacement, 3CX and Microsoft Teams Phone may both make your shortlist. The useful question is how each fits those daily tasks.
Evolute I.T. is a 3CX Gold Partner and a Microsoft Partner; this comparison aims to help you choose based on your business needs.
Start with the Microsoft licences you actually have
Having Teams for meetings and internal chat does not automatically give your business a phone system for calling regular telephone numbers. Teams Phone adds telephone system capabilities to Teams. It is generally an add-on licence, although some Microsoft 365 E5 plans include it, depending on your plan. Microsoft 365 Business Premium does not include Teams Phone.
You also need a connection to the public telephone network. Depending on your plan, location and provider, that can mean a Microsoft Calling Plan, Operator Connect or Direct Routing. The latter two options connect Teams to a telephone operator. Ask which arrangement is included in a quote and who supports it.
With 3CX, the phone system licence and telephone service are also separate considerations. Service typically connects through a SIP trunk, an internet connection between your phone system and your telephone provider. For either option, identify what covers the system, your numbers and your calls before comparing costs.
Compare the everyday experience
Teams Phone has a clear advantage for employees who already spend their day in Teams: they can handle calls in the same application as meetings and internal conversations. That can make adoption easier. Still, familiarity with Teams meetings does not replace checking how telephone tasks work.
3CX has its own applications and a web client that runs in a browser. It integrates with Microsoft 365 for user synchronization and presence, which indicates whether someone is available. It can also integrate with Teams, depending on the configuration and licences involved. Ask what information and functions carry between the systems.
For a useful demonstration, have someone answer a call, consult a colleague before transferring it, retrieve a held call and cover for an absent coworker. Include mobile use if employees regularly work away from their desks.
Let the person who handles reception take part. Their experience may matter more than how convenient occasional outgoing calls feel to everyone else.
Match customer service features to actual needs
Both platforms offer call queues and automated menus that direct callers to the right destination. A call queue holds incoming calls until someone can answer. For a business with one reception number and a few departments, those capabilities may cover most requirements.
3CX also offers live wallboards, reporting and skills-based routing in higher editions. Skills-based routing sends calls to people with the appropriate expertise or language. Its messaging features can bring website live chat, WhatsApp and SMS into a shared inbox, depending on the edition and compatible services configured.
Teams has call queues and auto attendants. More advanced contact centre requirements often involve additional certified contact centre solutions, which bring their own licensing and implementation considerations.
Write down what staff need to accomplish: follow up on missed calls, handle lunch coverage, review waiting calls or respond to customer messages. Then ask each provider to show those tasks using the proposed package. Feature names alone won’t tell you what is included or how easy the work will be.
Check what a CRM integration will actually do
A customer relationship management system, or CRM, holds customer details and follow-up records. Connecting it to your phone system can help staff find a customer’s record when the phone rings. Depending on the integration, it may also let them start calls from a record or log call activity.
3CX integrates with many CRMs. Evolute I.T.’s in-house developers also build connectors between 3CX and CRM systems. A custom connector can address a specific workflow, but its design, testing and ongoing maintenance belong in the scope and budget.
Teams also offers integrations through applications and partners. For both platforms, confirm what works with your particular CRM version and subscription.
Request a demonstration of an incoming call, an outgoing call and the information saved afterwards. Also establish who will investigate problems when either product changes. A compatible product name on a list is a starting point, not a complete description of the integration.
Review desk phones, existing numbers and analogue equipment
3CX supports many IP phone brands. These desk phones carry calls over your computer network. You may be able to reuse existing devices, but the exact model, installed software and supported configuration need checking. For desk phones connecting directly to Teams Phone, plan on Teams-certified devices.
Both options generally let you keep existing numbers through number porting, which transfers a number to the new provider. Confirm eligibility and the transfer process for every number you use. Keep the old service active until the transfer has completed and been checked.
Include fax machines and alarm systems in your inventory. A gateway is a device that connects analogue equipment to a newer telephone system, and it may be an option depending on the platform and operator. Compatibility must be verified for the specific use. Have the alarm provider validate any proposed change to an alarm connection.
Testing should cover incoming and outgoing calls as well as the equipment that depends on the line.
Compare hosting responsibility and total cost
3CX can run through hosted service, in a private cloud or on premises. That flexibility allows different arrangements, but someone must be responsible for updates, security, backups and availability. An on-premises installation does not, by itself, ensure that external calls will continue during an internet outage.
Teams Phone runs in Microsoft’s cloud. You do not host the telephone platform yourself, although your internet connection, devices and telephone service still affect the overall setup. For either platform, ask what happens during a local power failure or internet outage.
3CX licensing is based on simultaneous calls rather than individual users. Estimate how many conversations your business needs at once, then account for SIP trunks, applicable hosting and selected services. Teams Phone generally uses per-user licensing plus calling service, taking existing licence entitlements into account.
Compare complete quotes: devices, headsets, setup, number transfers, training, CRM work and contact centre add-ons can all affect the result. Identify ongoing support and maintenance responsibilities too. The lowest licence line does not necessarily produce the lowest total cost.
Which fits when?
- Your team already works in Teams and has straightforward calling needs: Teams Phone is worth evaluating, especially when your existing subscription includes some required licensing.
- Your reception or customer service team handles busy queues and several messaging channels: give 3CX a closer look, with a demonstration of the proposed reporting and shared inbox functions.
- You want a choice of hosting arrangements or hope to reuse compatible desk phones: 3CX’s flexibility may be useful.
- Your CRM drives daily work: compare the actual integrations available for both platforms, including maintenance and any additional subscriptions.
Before deciding, let the people answering calls try the proposed setup. Test ordinary work and common exceptions, such as an unavailable colleague or a call that needs transferring twice.
The best fit comes from matching the system to your callers and staff. Start with real workflows, then confirm the licences, equipment and support needed to make them work reliably.
Explore our 3CX phone system service for more about that option, or contact us to discuss your current setup and what to include in your comparison.
