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How Can VPN Affect VoIP Calls?
How Can VPN Affect VoIP Calls?
Updated over a week ago

Here is a brief explanation of how the use of a VPN can impact VoIP calls:

  • VPNs route traffic through an encrypted tunnel, introducing latency that degrades call quality and may result in choppy audio or dropped calls.

  • The process of VPN tunneling and encryption adds overhead, slowing down connections. This reduced speed poses challenges for VoIP systems in transmitting voice packets quickly enough for natural conversations.

  • VPNs may decrease available bandwidth, particularly on crowded or slower networks. The quality of VoIP calls relies heavily on maintaining consistent, high-bandwidth connections.

  • Due to the limited number of VPN connection points, distant endpoints can lead to extended round-trip times, causing disruptions in calls.

  • VPN encryption obscures the original source IP address information crucial for VoIP call setup and quality optimization, potentially resulting in call failures.

  • Certain VPN protocols, like GRE, are not conducive to VoIP, causing significant degradation in voice quality.

  • Instabilities in VPN tunnels contribute to increased jitter and packet loss, significantly impacting the overall quality of VoIP calls.

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