Optimize your phones by fixing these VoIP issues

When a technology that promises to halve your current expenses sounds too good to be true, it usually is. So when it comes to Voice over Internet Protocol (VoIP) and its claims of radically reducing phone costs, what’s the catch? Here are some issues you need to watch out for.

Any of these VoIP issues can tarnish your company’s reputation and result in a profit loss, so it’s important to implement the following solutions.


Jitter or crackly sounding calls result from electromagnetic interference, damaged equipment, or insufficient enough bandwidth. Here are some ways to fix this:

  • Make sure the phone cables are not damaged
  • Move your VoIP equipment far apart from each other to avoid electromagnetic interference
  • Do a bandwidth speed test

Echoes and audio delays

Echoes and audio delays are common issues usually caused by network latency, headset lag, or the device itself. Here are tips to solve this problem:

  • Make sure the device is properly plugged in and has the latest software updates.
  • Unplug the phone and plug it back in. This will empty the buffers and allow the phone to re-sync with your internet connection.
  • Try using a corded headset. Bluetooth headsets tend to lag, resulting in audio delays
  • Make sure you have enough internet bandwidth.

Dropped calls

Some users experience calls being dropped after 11 minutes. This usually happens when phones are not using the latest firmware, or because of a user datagram protocol (UDP) timeout. Here’s how to fix these issues:

  • Make sure your phones are using updated firmware.
  • Adjust your router settings to avoid UDP timeouts, or use Transmission Control Protocol (TCP).

Can’t make calls

If you’re unable to make outbound calls, or if you see a big X on the VoIP phone’s screen, it could mean that you’re using two routers dropping critical packets of data. This issue is caused by your network layout. Disable your router’s Session Initiation Protocol Application-Level Gateway (SIP ALG). You also have to make sure that you’re not using two routers, as this can inhibit the flow of data packets. Another way to fix this issue is to connect your VoIP phones to a virtual local area network (VLAN).

No sound

Are your calls connecting but you can’t hear the person on the other line? Chances are, your firewall is blocking the Real-Time Transport Protocol (RTP) packets from coming through. To address this issue, you need to open some ports in your firewall.

Calls are redirected to voicemail

If you notice your VoIP phones are not ringing, it’s possible that the calls are being redirected to voicemail. To fix this, make sure that your phone is not set to Do Not Disturb (DND) mode. Also, check if your VoIP phones are still registered with your VoIP provider.

If you need advice on installing a new VoIP system or fixing your current one, don’t hesitate to call us. Our experts can provide you with the consultation, support, and service that will enable your business to enjoy the cost savings and power of VoIP. Call us today.

Published with permission from TechAdvisory.org. Source.