What Affects the Cost of VoIP Telephony?
There is no single pricing model that fits every business. The total cost of a VoIP solution depends on several variables.
Number of Users
The more employees use the system, the greater the requirements for phone numbers, extensions, and communication services.
Type of Solution
Costs vary significantly depending on the solution you choose:
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VoIP Numbers
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SIP Trunk
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Cloud PBX
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3CX
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Contact Center Solutions
Each option addresses different business needs and follows a different pricing model.
Call Volume
Businesses with a large volume of outbound or international calls typically have different requirements than organizations that primarily receive inbound calls.
Advanced Features
Features such as:
may influence the overall cost of the solution.
International Numbers and Global Presence
Organizations operating across multiple countries often require international phone numbers or multi-country telecommunications coverage, which may affect pricing.
Cost by Solution Type (VoIP Number / SIP Trunk / Cloud PBX)
Let's examine the most common business telephony options.
VoIP Number
The simplest form of VoIP telephony.
It is particularly suitable for:
At modulus, VoIP numbers start from €18 per year per number, providing an affordable way to establish a professional business presence.
SIP Trunk
A SIP trunk allows businesses to connect their existing PBX system to a VoIP network.
It is ideal for organizations that:
Pricing is typically influenced by:
Cloud PBX
A cloud PBX delivers all the functionality of a modern phone system without requiring on-premises hardware.
Features typically include:
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IVR
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Call Routing
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Mobile Applications
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Reporting
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Call Queues
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User Management
Compared to traditional PBX systems, cloud PBX solutions usually offer significantly lower deployment and maintenance costs.
VoIP vs Traditional PSTN Telephony Cost Comparison (10-User Company Example)
Let's look at a typical example of a business with 10 users.
| Cost Category |
Traditional PSTN Telephony |
VoIP Telephony |
| PBX Hardware Purchase |
High upfront investment |
Not required |
| Telephone Lines |
PSTN / ISDN |
Internet Connection |
| Hardware Maintenance |
Yes |
No |
| Software Upgrades |
Additional cost |
Typically included |
| Remote Work Support |
Limited |
Full |
| Adding New Users |
Requires additional equipment |
Instant |
| Call Costs |
Higher |
Lower |
| Total Cost of Ownership (TCO) |
High |
Significantly lower |
For a 10-user organization, the largest savings typically come from:
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Eliminating PBX hardware purchases
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Removing maintenance costs
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Reducing call charges
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Simplifying future scalability
For this reason, most new business telephony deployments today are based on cloud VoIP infrastructure.
What's Included in modulus Pricing? No Hidden Fees
Pricing transparency is one of the most important criteria when selecting a telecommunications provider.
At modulus, pricing is designed to be simple, predictable, and transparent.
Pay-As-You-Go Billing
You only pay for the services and call minutes you actually use.
There is no requirement to purchase large bundles that may go unused.
No Hidden Setup Fees
There are no unexpected activation charges after signing your agreement.
No Charges for Unused Minutes
Costs are directly tied to actual service usage.
Access to Expert Support
With more than 19 years of telecommunications experience and over 14,000 business customers, modulus provides expert technical support and consulting throughout every stage of implementation.
Cloud-Native Telecommunications Infrastructure
All services are delivered through carrier-grade infrastructure designed for high availability, reliability, and business continuity.
How to Request a Quote
The ideal solution depends on the unique requirements of your business.
Before requesting a quote, it helps to know:
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The number of users
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Expected call volume
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Whether you already have a PBX system
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Whether you need SIP Trunk or Cloud PBX services
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Whether Microsoft Teams Integration is required
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Whether CRM or ERP integrations are needed
The modulus team can assess your requirements and recommend the most suitable solution, whether you need VoIP numbers, SIP Trunk services, a cloud PBX platform, or a 3CX deployment.
Contact us today for a personalized quote and discover how your business can reduce communication costs while improving flexibility and productivity.
