How to Set Up VoIP in 7 Steps (+Tips & Best Practices)

Moving to VoIP is usually simpler than installing a traditional business phone system because most hosted services do not require extensive wiring or an on-site PBX. However, problems can still arise if you rush the installation. Incorrect settings, poor call routing, or untested devices can lead to missed calls, unclear audio, and downtime.

A clear plan can prevent these problems and keep your business calls running during the switch. If you are wondering how to set up VoIP, the process starts with choosing the right service, preparing your network, and deciding which devices and phone numbers to use.

This guide explains how to install VoIP in seven simple steps, from preparing for the move to connecting your devices, configuring the system, and testing your new business phone system.

VoIP Installation Checklist

Before starting your VoIP installation, review the following requirements so you can prepare your network, devices, and call settings in advance:

Requirement	What to check
Internet connection	Available upload and download bandwidth, latency, jitter, and packet loss
Users and call volume	Number of users, locations, extensions, and expected concurrent calls
Devices	IP desk phones, headsets, computers, mobile devices, or analog telephone adapters (ATAs)
Network equipment	Router, Ethernet cabling, network switches, and Power over Ethernet (PoE), if needed
Phone numbers	New local or toll-free numbers and any existing numbers you plan to port
Call flow	Business hours, extensions, auto-attendant menus, ring groups, voicemail, and call forwarding
Security	Strong passwords, access controls, encryption, firmware updates, and firewall rules
Rollout plan	Installation date, number-porting schedule, testing period, staff training, and backup service

If you plan to transfer existing phone numbers, keep your current service active until the porting process is complete. Your new provider can confirm the required account information, estimated transfer time, and any steps you need to take before the scheduled porting date.

What Is VoIP?

Voice over Internet Protocol (VoIP) is a communications technology that allows you to make voice calls over the internet instead of using traditional analog phone lines. It converts audio into digital data packets that travel over the internet.

How Does VoIP Work?

A VoIP phone system connects IP phones (also known as VoIP phones) or softphones (mobile and desktop apps) to the internet through a VoIP provider.

The audio is converted to data packets and transmitted over the internet using the internet protocol (IP). If necessary, the provider’s data center converts the data back to analog signals and routes it through the public switched phone network (PSTN).

With hosted VoIP, you do not need to maintain an on-site PBX server. The provider hosts the calling platform and manages the main service infrastructure.

VoIP phone system vs. analog phones

Traditional analog phones rely on a tangle of wires and dedicated phone jacks for each user. VoIP cuts the cord, letting you use your existing internet connection to make calls. This translates to:

• Reduced costs: No more installation fees for extra phone lines, and VoIP plans often offer significant savings on long-distance calls.
• Enhanced collaboration: VoIP systems integrate features like video conferencing, instant messaging, and voicemail to email, boosting communication and teamwork.

Instead of bulky landlines, VoIP uses SIP phones. These devices connect to your VoIP provider through your internet, eliminating the need for dedicated phone lines.

While traditional phone systems require a complex PBX (Private Branch Exchange) for multiple users, VoIP offers a more user-friendly approach.

What Do You Need for a VoIP Setup?

You can easily set up VoIP, but you should first know what exactly you need for a VoIP setup.

1. High-speed internet connection

A reliable high-speed internet connection is crucial for VoIP phone service. VoIP calls require sufficient bandwidth to transmit audio data in real time without interruptions or quality issues.

Generally, you need at least 100 kbps of bandwidth (both upload and download) for each concurrent call.

Most modern broadband internet plans from cable/fiber providers should suffice, but you’ll want to test your speeds. A wired ethernet connection is preferable to WiFi for VoIP to minimize interference and packet loss.

2. A reliable VoIP service provider

You’ll need to subscribe to a VoIP phone service from a trusted provider like Nextiva. The provider hosts the VoIP platform and routes your calls over the internet.

They assign you new VoIP phone numbers or allow you to port over existing numbers. Most providers offer monthly or yearly service plans with different features and number of lines.

3. VoIP phones/headsets or softphones

To make and receive VoIP calls, you need VoIP-enabled hardware like handsets, IP phones, VoIP headsets, or a softphone application.

• IP phones look just like regular phones but have an Ethernet port to connect to your network.
• Wireless VoIP headsets allow more mobility.
• Softphones work on your computer, tablet, or smartphone (Android or iOS) as a virtual phone and help you make calls from practically anywhere with a good internet connection.

4. Optional hardware

Here’s some additional equipment you might need:

• Routers: You can use an existing compatible router, but you may need to upgrade it if it cannot support your expected call volume, QoS settings, or other network requirements.
• Analog Telephone Adapters: These adapt regular analog phones to work over VoIP by connecting to your router/network.

At the most basic, you need the internet pipeline, a VoIP “pipe” provider, and VoIP end-point devices as the minimum requirements to build a VoIP phone system. Optionally, additional hardware like VoIP routers and ATAs provide more flexibility.

7 Simple Steps to Set Up a VoIP Phone System

Now onto setting up your VoIP phone system. Let’s look at a few simple steps to quickly set up VoIP.

1. Test your network readiness

Before getting started, your internet connection must meet the bandwidth requirements to support VoIP calls without disruptions. As mentioned earlier, you’ll need at least 100 kbps of upload and download bandwidth per concurrent call.

Run a speed test to verify your internet speeds, and test for factors like jitter and packet loss that can degrade call quality. Wired ethernet connections are preferred over WiFi to minimize interference.

If you have multiple users or bandwidth-heavy applications, configuring QoS on your router to prioritize VoIP traffic can help ensure optimal performance.

2. Choose the right VoIP devices

Once your network is VoIP-ready, you’ll need to invest in the right hardware for your needs.

VoIP desk phones with RJ-45 ethernet ports provide a familiar telephony experience similar to traditional analog phones. Wireless VoIP headsets enable hands-free mobility.

If you want your phone calls to sound great, you should invest in a high-end VoIP desk phone. Desk phones range from basic models for making and receiving calls to advanced models with touchscreens, Bluetooth, video, and expansion modules. Choose a phone supported by your VoIP provider and matched to the employee’s calling needs.

For businesses looking to save on upfront costs, softphone applications that run on computers or cell phones can serve as virtual VoIP phones. Additionally, check that every device is compatible with your provider. You should also confirm whether your desk phones require PoE, AC adapters, Bluetooth, Wi-Fi, or expansion modules.

3. Find a VoIP Provider with matching features

With the networking and hardware requirements addressed, your next step is selecting the best VoIP service provider that offers the features your business needs.

Look for providers with advanced call routing capabilities to ensure calls are directed efficiently to the right person or department.

Auto-attendant and interactive voice response (IVR) menus present a professional front for greeting callers. Call analytics and reporting tools enable you to monitor agent performance and call metrics.

Many providers also integrate with customer relationship management (CRM) platforms and offer collaboration features like video conferencing, screen sharing, and team messaging.

Also, look for security features like end-to-end encryption and compliance with key data privacy protocols.

4. Get a business phone number

When signing up for a business VoIP service, you can choose to port over your existing phone numbers or get new local, toll-free, or vanity numbers (e.g. 1-800-FLOWERS) that align with your company’s branding and market presence.

Most reputable VoIP providers handle this porting process seamlessly.

5. Set up your VoIP phone system

Once you have established your provider account and acquired your phone numbers, create user accounts and assign each person a number, extension, device, and permission level. Then configure your business hours, auto attendant, call queues, ring groups, voicemail, caller ID, and call-forwarding rules.

Install the provider’s desktop or mobile app for employees using softphones. If you are using desk phones or analog equipment, follow the hardware installation steps above to connect and provision each device.

Softphone vs. IP phone setup

Softphones run on existing computers or mobile devices, while IP phones require physical hardware connected to your network.

Setup factor	Softphone	IP phone
Installation	Download the provider’s app and sign in	Connect and provision a compatible desk phone
Connection	Ethernet, Wi-Fi, or mobile data	Usually Ethernet
Power	Uses the device’s existing power source	Uses PoE or a compatible AC adapter
Best for	Remote, hybrid, and mobile employees	Reception areas and office-based employees

After setup, test the microphone, speakers, notifications, and calling permissions on softphones. For IP phone setup, follow the hardware installation steps above to complete the cabling, power, provisioning, and call tests.

6. Test your new VoIP line

Even if you have a fast internet connection, it’s critical to thoroughly test your new VoIP phone lines before fully rolling them out. Pay close attention to the following factors when making test calls:

• Audio quality: The calls should be clear and consistent without any static, echoes, or other audio issues that indicate low quality. Poor audio makes conversations difficult.
• Latency: There should be minimal delays between when you speak and when the other party hears it. Significant latency disrupts natural conversation flow.
• Connection stability: Monitor if any calls temporarily drop or disconnect, which could be caused by firewall settings terminating calls after a certain duration like 11 minutes. Plan extended test calls of 15-30 minutes.

Try testing during periods of peak network activity when more devices/applications are consuming bandwidth. Network jitter and congestion can lead to dropped calls, choppy audio, and other VoIP issues.

Pro Tip: A wired ethernet connection direct to the router/network switch is always preferable to using Wi-Fi, which is more susceptible to interference that causes latency, jitter, and lost packets.

Test your outbound caller ID by calling a mobile phone or another number where you can confirm the number displayed. If you do encounter any persistent quality issues during testing, refer to guides on common VoIP problems and easy fixes.

7. Train your staff on VoIP features

For many businesses, transitioning to VoIP provides access to advanced telephony capabilities their traditional phone system lacked, such as:

• CRM integration for screen pops of customer data
• Custom call routing policies and rules
• Voicemail to email/text transcriptions
• Call recording to the cloud
• Video conferencing and collaboration tools

Ensure you provide proper training so employees understand and can leverage all the powerful VoIP features to be more productive.

Don’t assume training is unnecessary — take time to develop materials like training videos, documentation, guides, etc. Top VoIP providers offer extensive libraries of pre-built training resources that cover the system’s full capabilities.

Also, use the provider’s customer support for additional one-on-one guidance to go over any outstanding questions as your staff gets acquainted with the new VoIP system and unified communications tools.

VoIP Network Configuration Settings to Review

Hosted VoIP may be simple for employees to use, but the network must still handle voice traffic correctly. Ask your provider or an experienced network administrator to review the following settings before installation.

Quality of Service

Quality of Service (QoS) gives real-time voice traffic priority when the network becomes busy. Configure it across all relevant routers and managed switches rather than on individual phones alone. Your provider can give you the required traffic markings, IP ranges, and port information.

Router and firewall rules

Your firewall must permit the signaling, media, device provisioning, and time-synchronization traffic used by your VoIP service. Since SIP and RTP requirements vary by provider, application, and phone model, do not copy a generic list of ports from another service. Use the latest network guidelines from your provider instead.

You should also avoid broad port-forwarding rules unless your provider specifically requires them. Keep your firewall firmware current and place any provider-specific rules in the correct order.

SIP ALG

SIP Application Layer Gateway (SIP ALG) modifies VoIP traffic as it passes through a router. Although it works on some networks, it can also cause one-way audio, failed device registration, and dropped calls.

Nextiva recommends disabling SIP ALG on the router or firewall when using its service. However, you should check your provider’s guidance before changing this setting.

Voice VLANs

A voice virtual local area network (VLAN) separates phone traffic from other network traffic. This separation can simplify QoS management, security policies, and troubleshooting in larger or busier offices. However, a small team with only a few phones may not need a separate voice VLAN.

Double NAT

Double network address translation (NAT) occurs when two devices, such as an internet service provider’s gateway and a separate router, both handle routing. This setup can cause one-way audio, failed call transfers, device deregistration, and dropped calls.

If double NAT affects your VoIP service, a network administrator can place the ISP gateway in bridge mode or change the network design to remove the conflict.

How to Install VoIP Phone Hardware

The physical part of a VoIP phone installation is usually straightforward, although the exact process depends on your phones and network equipment. Before beginning the IP phone setup, check that every phone works with your provider and that your network has enough Ethernet ports and power capacity.

Follow these steps to install your VoIP phone hardware:

1. Provision each desk phone: Assign the phone to the correct user, extension, and business number through your provider’s admin portal. Some providers use the phone’s MAC address to connect it to the correct account. If the phone arrives pre-provisioned, it may download its settings automatically once it connects to the internet.
2. Connect the Ethernet cable: Use a Cat5e or Cat6 cable to connect the phone’s LAN or network port to a router, network switch, or wall jack. Be sure to use the network port rather than the PC port on the back of the phone.
3. Connect the phone to power: If your network switch supports Power over Ethernet (PoE), a single Ethernet cable can carry both data and power. Otherwise, use the manufacturer-approved AC adapter. You can also use a PoE injector if your current switch does not support PoE.
4. Connect a computer if needed: Many IP phones include a separate PC port, which lets the phone and computer share one wall connection. Check that your phone supports this arrangement and that the network can carry traffic from both devices.
5. Use an ATA for analog equipment: An analog telephone adapter connects compatible analog phones, fax machines, paging systems, and other legacy equipment to the VoIP network. Check with your provider first, as some analog devices require a separate service or additional configuration.
6. Wait for provisioning to finish: The phone may restart or download configuration files and firmware after you connect it. Once the process finishes, check that the screen displays the correct user, extension, time, and available line.
7. Confirm registration: Check that the phone displays the correct user and extension, then make one incoming and outgoing call. Complete the full call-quality and feature testing described in step six before rollout.

Businesses can compare compatible VoIP desk phones based on display size, line capacity, PoE support, Bluetooth connectivity, and other calling needs.

Can You Set Up Your Own VoIP at Home?

Yes, you can set up VoIP at home without advanced technical knowledge. Residential VoIP services offer affordable monthly plans for home phone users who want to make calls over the internet rather than a traditional landline.

Here’s how to set up residential VoIP:

1. Choose a VoIP provider: Compare residential plans based on pricing, calling areas, phone-number availability, and included features.
2. Select your preferred device: Connect a VoIP hardware phone to your router or use a softphone on your computer or smartphone. You may need an analog telephone adapter if you want to keep using an existing analog phone.
3. Set up your number and features: Choose a new phone number or transfer an existing one. Then configure voicemail, caller ID, call forwarding, and other available features.
4. Test your connection: Make incoming and outgoing calls to check audio quality, delays, and connection stability.

While setting up residential VoIP yourself is possible, a business-grade hosted VoIP service is usually a better choice for home-based businesses.

Business VoIP providers offer unified communications features beyond voice calls, including video conferencing, SMS, team collaboration, CRM integrations, and advanced call-handling tools.

These features create a more professional phone presence and make the system easier to scale as the business grows. Business plans also typically include more dedicated customer support than residential VoIP services.

You can also host your own VoIP server, but self-hosting requires technical knowledge of PBX software, SIP configuration, network security, call routing, carrier connections, emergency calling, software updates, fraud prevention, and backups.

Self-hosting may suit an individual who wants to experiment with VoIP or maintain complete control over a small system. However, it usually stops making practical sense once a business has multiple users, depends on customer calls, operates across several locations, or needs dependable support and compliance controls.

At that point, a hosted VoIP provider can manage the technical infrastructure while the business focuses on daily communications.

5 Best Practices to Set Up VoIP

Here are some key considerations and best practices to help your VoIP system work efficiently and optimally.

1. Invest in VoIP-optimized equipment

Use VoIP-optimized desk phones, headsets, routers, and other equipment optimized for voice traffic prioritization. Legacy hardware may not provide the performance and call quality needed. Consider devices that support Power over Ethernet (PoE), a standard that allows network cables to carry electrical power.

2. Use softphones instead of complicated VoIP hardware

While physical VoIP hardware still has its advantages, using softphones simplifies VoIP implementation with no complicated setup procedures.

You bypass the hassles of purchasing, configuring, and wiring dedicated VoIP phones or ATAs. Softphone applications run on devices you already own like computers, tablets, and smartphones, and integrate directly with your VoIP provider’s service to make/receive calls over the internet.

They save you hardware costs, set up in minutes by just downloading the app, use existing devices, and offer mobile flexibility instead of desk phones.

3. Secure your VoIP system

Enable encryption for VoIP calls and adopt VoIP security best practices like firewalls, VPNs, access control policies, and keeping firmware updated to mitigate risks of toll fraud, eavesdropping, or Denial of Service (DoS) attacks.

4. Monitor, analyze, and optimize

Continuously monitor your VoIP system’s performance using built-in analytics tools. Identify usage patterns, call quality issues, and proactively maintain optimal performance through upgrades or adjustments.

5. Plan for redundancy and failover

Implement network redundancy like secondary internet connections from different providers. Configure automatic failover to these backup links if the primary connection fails, maintaining VoIP availability.

Common VoIP Installation Problems

VoIP installation problems often come from incompatible equipment, incorrect connections, provisioning errors, or incomplete account information. Check these areas before moving your entire team to the new system.

Installation problem	Why it happens	What to do
The phone is incompatible with the provider	The phone model or firmware does not support the provider’s provisioning system.	Check the provider’s supported-device list and replace or update the phone if necessary.
The phone is connected to the wrong port	The Ethernet cable is plugged into the PC port instead of the LAN or network port.	Move the cable to the phone’s LAN or network port.
The phone does not receive power	The switch does not support PoE, has reached its power limit, or the phone requires an AC adapter.	Check the switch’s PoE capacity or connect a compatible adapter or PoE injector.
The phone is assigned to the wrong user	The MAC address, extension, or device details were entered incorrectly.	Match the phone’s MAC address with the correct user and extension in the admin portal.
An analog device does not connect	The ATA is incompatible or has not been configured for the connected equipment.	Confirm that the provider supports the ATA and configure it for the connected device.
Number porting is delayed	The submitted account details do not match the current carrier’s records.	Correct the account information and keep the current service active until the port is complete.

Once the installation and account details are correct, use the troubleshooting tips below to address call-quality and ongoing performance problems.

VoIP Troubleshooting Tips

Once you set up using VoIP, it’s good to know about common VoIP issues and keep some troubleshooting tips handy to avoid downtime and customer frustration.

Follow these VoIP troubleshooting tips and take a structured approach to identify and resolve most VoIP quality and performance issues during setup and ongoing usage.

Use wired Ethernet connections

While modern WiFi can handle VoIP calls reasonably well, a wired ethernet connection directly to your router/switch is still the recommended option for VoIP.

Wired connections provide a more stable connection with lower latency, jitter, and packet loss compared to WiFi, which is susceptible to interference and congestion. This results in higher voice quality and fewer dropouts.

Configure QoS to prioritize voice traffic

Many routers and networks allow you to configure Quality of Service settings to intelligently prioritize VoIP/voice packets over other data like web browsing and video streaming. Properly implementing QoS ensures your VoIP calls get the bandwidth priority they need for crystal-clear audio, even during network congestion.

Test lines under regular and peak network loads

Test your VoIP lines not just when the network is idle, but also during peak usage hours when bandwidth is being consumed by other devices/applications. Voice quality issues like choppiness, static, and dropouts are more likely to occur when the network is under heavy load.

Contact your provider’s support for persistent issues

If you’ve tried all the troubleshooting steps and are still experiencing persistent voice quality problems or poor connectivity, don’t hesitate to contact your VoIP provider’s customer support. Describe the issues in detail so they can help analyze reasons like network misconfiguration, firewall settings, router compatibility, and more.

Bonus tips

Here are some more tips to keep in mind:

• Reboot network hardware periodically: Routers, switches, and other network hardware can occasionally get bogged down and disrupt VoIP performance. A periodic reboot can clear memory/resources.
• Update firmware and drivers: Ensure all hardware like VoIP phones, headsets, and network gear are running the latest up-to-date firmware/drivers for stability and bug fixes.
• Check your bandwidth usage: If VoIP calls worked fine initially but voice quality degraded over time, you may need to analyze your network’s total bandwidth usage from other applications like cloud backups, file sharing, etc. Increase bandwidth if needed.
• Use a VoIP test tool: There are free online tools like Nextiva’s VoIP speed test that can test your connection’s VoIP readiness and identify culprits like packet loss or jitter-causing issues.

How Nextiva Simplifies Your VoIP Setup

If you’re looking to set up VoIP without getting bogged down in setup complexities, look no further than Nextiva. Our award-winning VoIP solution streamlines the process, ensuring a smooth transition for your business.

Nextiva is more than just a VoIP phone service; we’re a partner in your business communications.

With our user-friendly setup, extensive training resources, and exceptional support, we empower you to use the power of VoIP and seamlessly communicate with your customers.

What do we offer?

• Effortless setup with pre-provisioned phones: Nextiva’s VoIP desk phones arrive pre-provisioned, meaning all you need to do is plug them in and watch them spring to life.
• Become VoIP Savvy with extensive training resources: Get a comprehensive library of training resources.
• Unparalleled support whenever you need it: Our 24/7 Amazing Service is always on standby to answer your questions, troubleshoot any issues that may arise, and ensure your VoIP system continues to operate smoothly.
• Feature-rich solutions tailored to your needs: You get a variety of feature-rich plans catering to businesses of all sizes.
• Affordable pricing: The small business plan starts at $15 per user per month (billed annually), making it an ideal choice for businesses seeking a feature-rich VoIP solution without breaking the bank.

Whether your team is scattered across the globe, thrives in a central office environment, or uses a hybrid approach, Nextiva’s cloud VoIP adapts to your specific needs.