VoIP sends your business calls over the internet. That is what makes it flexible, affordable, and feature-rich. But it also means your phone system is part of your network, and it needs the same security attention as everything else on that network.
The good news: modern hosted VoIP platforms have strong security built in. The key is understanding what protections exist, what your provider handles, and what your business needs to do on its end.
Common VoIP Security Risks
- Toll fraud. Attackers compromise a phone system and make unauthorized long-distance or international calls. This can run up thousands of dollars in charges before it is detected.
- Eavesdropping. Without encryption, voice calls can theoretically be intercepted on the network. This is a concern for businesses handling sensitive client information.
- Denial of service (DoS). Flooding a VoIP system with traffic can disrupt phone service, preventing inbound and outbound calls.
- Phishing and vishing. Social engineering attacks that use phone calls to extract sensitive information from employees.
- Credential theft. Weak or reused passwords on VoIP accounts can lead to unauthorized access.
How Hosted VoIP Providers Protect You
A reputable hosted VoIP provider handles much of the security heavy lifting for you. Here is what to expect:
- Call encryption (SRTP/TLS). Voice traffic and signaling are encrypted end-to-end, preventing eavesdropping.
- Fraud detection. Automated systems monitor for unusual call patterns and block suspicious activity.
- Geo-redundant infrastructure. Data centers with physical security, redundant power, and network isolation.
- Regular security updates. The provider patches and updates the platform without requiring action from your team.
- Access controls. Role-based permissions ensure only authorized users can change system settings.
What Your Business Should Do
Even with a secure provider, there are steps your business should take:
- Use strong, unique passwords. Every VoIP account should have a unique password that is not shared with other systems.
- Secure your network. Use a business-grade router with firewall capabilities. Segment your voice traffic from general internet traffic if possible.
- Train your team. Employees should know not to share credentials, recognize vishing attempts, and report suspicious calls.
- Review call logs regularly. Check for unfamiliar numbers, unusual call times, or unexpected international calls.
- Limit international calling. If your business does not make international calls, ask your provider to disable international dialing.
VoIP Security vs. Traditional Phone Security
It is worth noting that traditional phone systems are not inherently more secure. Analog lines can be tapped with basic equipment. PBX systems have been targets for toll fraud for decades. The difference is that VoIP security threats are well understood and well defended against by modern platforms.
In many cases, a properly configured hosted VoIP system is more secure than the legacy system it replaces.
HIPAA and Compliance Considerations
For healthcare, legal, and financial services businesses, phone security is not just a best practice. It is a compliance requirement. HIPAA requires that protected health information transmitted by phone is secured appropriately.
Big Sky Telecom provides HIPAA-compliant VoIP with encrypted calls, secure voicemail, and a signed Business Associate Agreement. Learn more about HIPAA-compliant VoIP →
Questions to Ask Your Provider
- Do you encrypt voice traffic with SRTP and TLS?
- What fraud detection measures are in place?
- Where are your data centers located and what physical security do they have?
- Can you provide a Business Associate Agreement for HIPAA compliance?
- How are security updates and patches handled?
Bottom Line
VoIP security is a solvable problem. Choose a provider that takes it seriously, follow basic security hygiene on your end, and your business phone system will be well protected. The risk is not in using VoIP. The risk is in choosing a provider that cuts corners.
Big Sky Telecom provides secure, encrypted hosted VoIP to businesses across Western Montana. Our platform includes SRTP encryption, fraud monitoring, and HIPAA-compliant call handling. Locally owned and operated in Missoula, MT since 1998.