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Phone System Security Guide for Businesses

VBS IT Services

Phone wires and systems bundled together to create a blurry image

In an era where computer hacking garners significant media attention, it’s crucial not to overlook the vulnerability of your phone system to cyber threats. Understanding Best Practices for your business is a necessity. Phone system hacking is a prevalent issue, often underestimated by many. Hackers can exploit security vulnerabilities, resulting in unauthorized access to your phone lines and incurring massive international call charges without your knowledge. Protecting your business from phone system fraud requires a proactive approach. In this guide, we will explore essential steps to fortify your VoIP PBX phone system against cyber threats and ensure maximum security for your communication infrastructure.

Understanding Phone System Vulnerabilities

Before diving into the protective measures, let’s understand the different ways cybercriminals can exploit phone systems. Historically, wiretapping allowed physical connections to phone lines, but today, hackers have become more sophisticated, employing automated internet robots to exploit security weaknesses.

Phone companies consistently warn customers about the potential for criminal activities targeting various phone systems. While newer PBX phone systems come with built-in security features, the lack of proper security passwords remains a common issue.

Safeguarding Your Phone System: 8 Crucial Steps

  1. Comprehensive Password Protection: Secure your entire phone system with strong passwords, including administrative access and voicemail boxes. Avoid using easily guessable passwords like “1111” or “1234.” Opt for passwords with at least 6 digits, or better yet, 8 digits.
  2. Smart Password Practices: Never start passwords with “0” or “1,” and avoid using your own phone number or extension as a password. Change factory pre-set passwords, as these are often publicly available.
  3. Regular Password Rotation: Consistently change your passwords every three months as a good security practice.
  4. International Call Restrictions: Whenever possible, restrict international calls to minimize potential fraudulent charges. If needed, coordinate with your phone provider to set up long-distance access codes.
  5. Enhance Call Back Security: Password protect call back or call bridge phone system features with complex 8-digit passwords to prevent unauthorized access.
  6. Deactivate Unused Extensions and Voicemail Boxes: Eliminate potential weak points by disabling unused extensions and voicemail boxes.
  7. Secure Softphones: If your business uses softphones, ensure that employees utilize complex and unique 8-digit passwords to enhance security.
  8. Stay Up-to-Date with Software and Firmware: Regularly update your phone systems’ software and firmware to patch vulnerabilities and reinforce system security.

Conducting a Comprehensive Security Audit

While the aforementioned steps establish a strong foundation for phone system security, additional measures may be necessary depending on your business’s unique needs. It is advisable to conduct a thorough security audit, which can be facilitated by your service provider. This audit will help identify potential vulnerabilities and ensure maximum protection against cyber threats. Book a call with Miguel now to receive a free Cybersecurity Audit and take a step forward with the protection of your business.


By following the outlined steps and conducting a comprehensive security audit, you can shield your business’s phone system from cyber threats and unauthorized access. Proactive protection will not only safeguard your finances but also maintain the integrity of your communication infrastructure. Remember, phone system security is an ongoing process, and staying vigilant against emerging cyber threats will fortify your business against potential risks.

Protect your Business – Free Network Security Assessment

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