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Communications
Business Phone System Guide: VoIP vs Traditional Options
2 March 2026
11 min read
Phone Systems Still Matter
Despite the rise of email, chat, and video conferencing, phone calls remain essential for most businesses. Customers expect to reach you by phone. Many conversations are simply easier by voice than text.
Choosing the right phone system affects customer experience, staff productivity, and operational costs.
Understanding Your Options
Traditional Landlines (PSTN)
The original phone system:
How it worksCopper wires connect your phones to the public switched telephone network through a local exchange.
HardwareTraditional handsets, often connected to a PBX (private branch exchange) for multi-line businesses.
ReliabilityVery reliable — works during power outages with basic phones, decades of proven technology.
LimitationsExpensive for long-distance, limited features, declining availability as networks modernise.
VoIP (Voice over Internet Protocol)
Phone calls over the internet:
How it worksVoice is converted to data packets and transmitted over your internet connection.
HardwareIP phones, softphones (applications on computers or mobiles), or adapters for traditional handsets.
FlexibilityWork from anywhere with internet, extensive features, easy scaling.
DependencyRequires reliable internet; quality depends on network performance.
Hosted PBX (Cloud Phone Systems)
VoIP systems managed by a provider:
How it worksThe phone system runs in the provider's cloud; you use IP phones or apps.
BenefitsNo equipment to maintain, predictable monthly costs, automatic updates.
ExamplesMicrosoft Teams Phone, Zoom Phone, 8x8, RingCentral, and many others.
Hybrid Systems
Combinations of traditional and VoIP:
How it worksTraditional lines for reliability, VoIP for features and flexibility.
Use caseTransitional approach or situations requiring guaranteed backup lines.
Comparing the Options
Cost Considerations
Traditional landlines:
- Higher per-call costs, especially long-distance
- Hardware maintenance and replacement costs
- Generally higher monthly line charges
- Lower per-call costs, often unlimited calling plans
- Minimal or no hardware investment
- Predictable monthly subscription costs
- Internet costs already exist for most businesses
Feature Comparison
Basic features (both systems):
- Multiple lines and extensions
- Voicemail
- Hold and transfer
- Caller ID
- Voicemail to email transcription
- Mobile apps for business calling
- Call recording
- Video conferencing integration
- Auto-attendants and call routing
- CRM integration
- Analytics and reporting
Reliability Factors
Traditional lines:
- Work during power outages (basic phones)
- Decades of proven technology
- Independent of internet
- Dependent on internet reliability
- Dependent on power for network equipment
- May have quality issues with poor internet
- Can use mobile network as backup
Flexibility and Mobility
Traditional:
- Fixed to physical locations
- Remote workers need separate solutions
- Difficult to move or reconfigure
- Work from anywhere with internet
- Easy to add, remove, or move extensions
- Consistent experience across locations
- Mobile apps for on-the-go calling
Popular VoIP Options
Microsoft Teams Phone
If you use Microsoft 365:
Advantages:
- Integrated with Teams collaboration
- Single platform for chat, meetings, and calls
- Familiar interface for Microsoft users
- Requires Microsoft 365 licensing
- Additional per-user cost for phone capability
- Calling plan or direct routing required
Dedicated VoIP Providers
Standalone phone system providers:
Examples8x8, RingCentral, Vonage, Zoom Phone, GoTo Connect.
- Purpose-built for voice communications
- Often more phone-focused features
- May work better for call-heavy environments
- Another platform to manage
- May need integration with other tools
- Varying feature sets and pricing
Carrier-Hosted Solutions
Phone systems from telecommunications providers:
Advantages:
- Single vendor for internet and phones
- May include internet failover
- Local support options
- Features may lag dedicated providers
- Potentially less flexible
- Bundling does not always mean best value
Implementation Considerations
Internet Requirements
VoIP needs reliable internet:
BandwidthEach concurrent call needs roughly 100Kbps. Calculate for peak simultaneous calls.
QualityLatency, jitter, and packet loss affect call quality. Business internet is preferable.
PriorityQuality of Service (QoS) settings can prioritise voice traffic.
BackupConsider what happens if internet fails. Mobile apps, failover connections, or traditional backup lines.
Number Porting
Keeping your existing numbers:
- Most providers support porting existing numbers
- Process typically takes two to four weeks
- Temporary numbers may be needed during transition
- Verify porting availability before committing
Hardware Decisions
Choosing phones:
IP desk phonesTraditional feel, dedicated device, various price points.
SoftphonesApplications on computers or mobiles, no hardware cost, flexible.
HeadsetsImportant for comfort and quality if using softphones extensively.
Conference phonesDedicated devices for meeting rooms.
Training Needs
Transitioning to new systems:
- Basic training for all staff
- Advanced training for receptionists and heavy users
- Reference materials for common tasks
- Practice period before go-live
Making the Decision
When Traditional Lines Make Sense
Consider traditional if:
- Internet is unreliable in your area
- Emergency services access is critical (some areas)
- You have minimal feature needs
- Existing equipment has significant life remaining
When VoIP Makes Sense
Consider VoIP if:
- You have reliable internet
- Staff work from multiple locations
- You want advanced features
- Reducing costs is a priority
- Integration with other tools matters
Migration Approach
Options for transition:
Cut-overSwitch everything at once. Faster but higher risk.
PhasedMigrate departments or locations gradually. Lower risk but takes longer.
Parallel runningKeep both systems temporarily. Safest but most expensive.
Common Concerns
Call Quality
Quality concerns are manageable:
- Modern VoIP quality equals or exceeds traditional
- Requires adequate internet bandwidth and quality
- Proper configuration and QoS settings help
- Most issues relate to network problems, not VoIP itself
Reliability
Addressing reliability concerns:
- Use business-grade internet
- Consider redundant connections
- Ensure power backup for network equipment
- Mobile apps provide backup communication
- Some providers offer automatic mobile failover
Emergency Calls
Emergency service considerations:
- VoIP providers must provide emergency calling
- Address registration is important for accurate location
- Verify emergency calling works during setup
- Understand any limitations in your jurisdiction
Working with Providers
Questions to Ask
When evaluating providers:
1. What are the total monthly costs including all features? 2. What internet requirements are there? 3. How is emergency calling handled? 4. What support is included? 5. What is the contract term and termination policy? 6. Can you port our existing numbers? 7. What training and setup assistance is provided?
Implementation Support
Expect from a good provider:
- Network assessment before installation
- Professional setup and configuration
- Number porting management
- User training
- Ongoing technical support
Time to Upgrade Your Phone System?
Modern VoIP and Teams Phone systems that cut costs and work from anywhere. We handle setup, porting, and ongoing support.
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