4 Internet factors that affect call quality in an internal telephone exchange system

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Internet-based calling is the general trend for businesses when building an internal telephone exchange system. Today, outdated analog systems are gradually being replaced by smart virtual exchanges using VoIP technology, which offers integration capabilities and easy control and management. However, there are several factors that affect call quality which you should pay attention to when your connection shows signs of poor performance.

ATA/WiFi Router

If the WiFi router is overloaded, it will also affect the quality of internet calls on the internal telephone exchange system. Even if the internet speed is 50 Mbps and there are 20 devices connected, if the WiFi router can only handle 15 devices, both WiFi and call quality will not be guaranteed.

In addition, low-quality WiFi devices also emit unstable signals. Therefore, when investing in a WiFi router, pay close attention to the device’s load capacity. For an ATA/Router, you should consider the following:

• Compression technology (codecs) that needs to be supported
• Echo cancellation — a mechanism to reduce echo
• Firewall and security support
• Phone frequency
• IP phone frequency. In many cases, users of 5.8 GHz phones have encountered quality issues. When all troubleshooting methods fail, switching the phone to a lower frequency — for example 2.4 GHz — has resolved the problem.

WiFi distance

When installing a telephone exchange for an office, you should pay attention to the distance between WiFi devices. The greater the distance, the weaker the signal. WiFi signals have the following weaknesses: since WiFi operates as a wave signal, its stability is easily affected by obstacles. For example, when passing through walls, the WiFi signal weakens, and it can also be disrupted by interference from surrounding WiFi networks. Therefore, when using WiFi, choose a stable location for the best network quality and avoid obstacles.

In reality, the stability and call quality of a VoIP exchange depends not only on internet speed or the WiFi router, but is also influenced by the network connection of the service provider supplying the phone number, as well as the calling device and headset.

Some factors affecting the connection when installing an internal exchange that you should note

Bandwidth of the internal telephone exchange system

Internet speed and bandwidth are key factors that determine the call quality of a VoIP exchange. The greater the speed and bandwidth, the better the call quality. The minimum bandwidth required to make calls is 1 Mbps per device, and this requirement will increase depending on the number of devices and how each device is used in the office. If the measured speed divided by the number of connected devices (typically an employee has at least 2 devices — mobile and computer) falls below 2 Mbps per device, call quality will decrease.

Choosing hardware calling devices

Hardware calling devices are also one of the important factors that help calls run more smoothly. If you choose low-quality devices, calls are very likely to experience static, background noise, unclear voice, or poor noise filtering — all of which make customers uncomfortable.

However, the best choice does not necessarily mean equipping yourself with expensive devices. If they are not compatible with the system, noise and interference issues can still occur easily. The best approach is to consult your exchange service provider to select devices that are suitable and compatible with your exchange for the best possible call quality.

The above are the 4 basic Internet factors that affect the call quality of an internal telephone exchange system. If you have tried troubleshooting but call quality still does not improve, you can contact your exchange service provider to find an appropriate solution.

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