That trusty desk phone might seem harmless, but in 2025, it could be quietly putting your business at risk. While you’ve moved your phone system to the cloud, sticking with old handsets might be undermining everything you’ve upgraded for: security, functionality, and flexibility.
In this blog, we’ll break down the two big issues with legacy desk phones: security risks and missed opportunities.
The Hidden Threat Lurking in Old Desk Phones
Modern phone systems rely on regular security updates, encryption, and compatibility with the latest protocols. Outdated desk phones? Not so much.
Risks to Know About:
- Unpatched Firmware – Manufacturers often stop releasing updates for older handsets, leaving known vulnerabilities wide open.
- SIP Exploits – Old phones can become easy targets for SIP-based attacks like toll fraud or call hijacking.
- End-of-Life Support – If your hardware fails, it may be unsupported—leaving your team without a working phone and your IT team without answers.
In 2023, a UK-based law firm suffered a SIP toll fraud incident after attackers exploited a vulnerability in a 10-year-old desk phone model. The cost? Over £9,000 in unauthorised international calls in one weekend.
Holding Back Your Cloud System’s Potential
Modern VoIP and cloud systems are designed to deliver far more than just voice. But older phones can act as blockers to these advancements.
What You’re Missing Out On:
- HD Voice & Noise Cancellation – Older handsets often can’t support higher-quality audio.
- Smart Integrations – CRM popups, calendar syncing, or MS Teams call controls may be features not available on older phones.
- Call Analytics & Reporting – Some analytics platforms require specific phone firmware or APIs to feed data.
- User Experience – Touchscreens, visual voicemail, and Bluetooth headsets are now the norm.
Time to Rethink Your Desk Phones
Sticking with legacy hardware might save you money upfront—but the hidden costs in security gaps, reduced efficiency, and compatibility issues can quickly outweigh the savings.
What to Do Next:
- Audit your current desk phone models and firmware
- Check compatibility with your cloud system’s latest features
- Explore modern, secure VoIP handsets or softphone alternatives
Relying on outdated hardware might seem harmless, but it can quietly introduce security vulnerabilities, hinder productivity, and leave your business out of step with modern standards like Cyber Essentials. The good news is that upgrading doesn’t have to be complex or costly. In fact, investing in secure, feature-rich devices now can save you from far more serious—and expensive—problems down the line. Choosing to modernise is not just about keeping up; it’s about protecting your business and unlocking the full potential of your cloud phone system.
Speak to a member of our team today or book your free handset audit and take the first step towards smarter, safer communications.
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