💻 Softphone is an app that turns your laptop, mobile phone, or tablet into a business telephone. You make and receive calls over the internet, with no physical desk phone required.
This page explains what a softphone is, how it connects to a Cloud PBX, and what to look for when choosing one for your business.
How a Softphone Works
A softphone is software. It runs on a device you already own: a laptop, a smartphone, or a tablet. When someone calls your business number, the call travels over the internet to your Cloud PBX (your virtual phone system), which then routes it to your softphone app.
The call flow is straightforward. A customer dials your number. The Cloud PBX receives the call and decides where to send it, based on your routing rules. Your softphone rings. You answer, transfer, hold, or record, just as you would on a traditional desk phone.
Because everything runs over the internet, your location does not matter. You can take business calls from your home office, a client site, or a different country, using the same number and the same features.
- Customer dials your business number
- Call goes to your Cloud PBX
- PBX decides where to send it based on your routing rules
- Your softphone rings on your laptop or mobile
- You answer, transfer, hold, or record from anywhere
Why It Matters for Your Business
- No hardware to buy or maintain. A headset and an internet connection are all you need.
- Work from anywhere. Remote and hybrid teams stay reachable on their business number regardless of where they are.
- Scale without complexity. Adding a new employee means installing an app, not ordering and configuring a desk phone.
What to Look For
- Compatibility with your Cloud PBX. Some softphones are bundled with a PBX platform; others connect via a standard SIP protocol. Confirm compatibility before choosing.
- Call quality controls. Look for apps that support HD audio codecs and let you adjust bandwidth usage on slower connections.
- Mobile and desktop support. A good softphone runs on both platforms so your team can switch between devices without losing calls.
📋 Softphone vs Desk Phone: Key Differences
A desk phone is a dedicated piece of hardware. It sits on a desk, connects to a phone line or network port, and does one job. A softphone is an app. It runs on a general-purpose device and can be installed, updated, or removed like any other software.
For most small and medium businesses, a softphone delivers the same call features as a desk phone: extensions, hold, transfer, voicemail, and call recording. The main trade-off is that call quality depends on your internet connection, while a wired desk phone is less affected by network fluctuations.
Feature | Softphone | Desk Phone |
Hardware cost | None | 80 to 300 EUR per unit |
Works remotely | Yes | No (unless forwarded) |
Call quality | Internet-dependent | Stable on wired network |
🔗 How Softphone and Cloud PBX Work Together
A softphone is the tool you use to communicate. A Cloud PBX is the system that manages your calls. They work as a pair.
The Cloud PBX handles call routing, extensions, IVR menus ("Press 1 for Sales"), call logs, and recordings. The softphone is simply the endpoint: the device where a routed call arrives and where you respond.
This separation means you can mix device types. Some employees may use softphones on laptops; others may prefer mobile apps; a receptionist might still use a desk phone. The Cloud PBX routes calls to whichever device is registered.
📱 Types of Softphone Apps
Softphone apps fall into three categories.
Bundled apps come included with a Cloud PBX platform. The Voxbi app for Voxbi users works out of the box with its PBX system and is the simplest option for most businesses.
Standalone SIP softphones such as Zoiper, Bria, and Linphone connect to any SIP-compatible PBX. They offer more configuration options and suit businesses that want flexibility or already have an existing PBX.
Mobile-first apps such as Acrobits Groundwire are optimised for smartphones and work well for teams that are frequently away from a desk.
⚠️ Internet and Network Considerations
A softphone depends entirely on your internet connection. A stable, low-latency connection produces clear calls. A congested or slow network causes audio drops, delays, or echo.
For office use, a wired Ethernet connection is preferable to Wi-Fi for call quality. For remote workers on Wi-Fi, a modern router and a reasonably fast broadband connection (10 Mbps or more per user) are generally sufficient.
If your team regularly works from mobile networks, check whether your Cloud PBX provider supports call continuity features that hand off a call from Wi-Fi to 4G or 5G without dropping it. This is sometimes called Fixed Mobile Convergence.
🏢 Real-World Example: 10-Person Business
A 10-person company switches from a traditional phone system to a Cloud PBX with softphones. Each employee installs the softphone app on their laptop and mobile. The office manager sets up extensions (Sales = 101, Support = 102) and a simple IVR menu in the PBX admin panel.
Calls to the main business number now route automatically. Employees answer from wherever they are. The company no longer needs desk phones, a physical PBX box, or an on-site IT technician to manage the system. Monthly costs drop because calls run over VoIP rates rather than traditional PSTN lines.
Frequently Asked Questions
Do I need special equipment to use a softphone?
No special equipment is required beyond a device you already own. A laptop, desktop, smartphone, or tablet running the softphone app is sufficient. A headset with a microphone improves call quality and comfort, particularly for longer calls, but is not mandatory.
Can I keep my existing business phone number?
Yes. Most Cloud PBX providers offer number portability, which allows you to transfer your existing business number to the new system. The process takes a few days and is managed by your provider.
What happens if the internet goes down?
If your internet connection fails, your softphone will not be able to receive calls. To handle this, most Cloud PBX systems allow you to set a fallback rule: for example, forward unanswered calls to a mobile number. This ensures callers always reach someone even if your office connection is interrupted.
Is a softphone secure for business calls?
Reputable softphone apps and Cloud PBX platforms encrypt calls using TLS and SRTP protocols. This protects the content of your calls from interception. Confirm that your provider uses encrypted transport before handling sensitive conversations over VoIP.
Can one person use a softphone on multiple devices at the same time?
Yes. Most Cloud PBX systems allow a single extension to ring on several devices simultaneously. For example, a sales manager can have the same extension active on a laptop and a mobile. The first device to answer takes the call.
📅 Ready to explore Cloud PBX for your business?
Start with the provider comparisons or feature guides. If you want expert help, book a short call with a consultant.
Related Features
- Fixed Mobile Convergence — Keep one number across desk and mobile
- Call Routing — Control how incoming calls reach your team
- Auto Attendant / IVR — Greet and direct callers automatically
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