Which factor affects voice quality most in VoIP calls?

Survival in this current information age can be a difficult task if you don’t have the right and dependable hardware to administer your business solutions. Along with the expanding technology, the complications of deployment of software in business is also growing. Furthermore, a number of biggest issues have come forward from the VoIP phone services in the world of business communication. Issues that are related to voice quality and often the bandwidth can overpower the impressive life of VoIP services. Nonetheless, there is plenty of improvement being made in the VoIP services and businesses are particularly fussy about a lot of factors which affect the call quality of VoIP. Below we are going to discuss the factors which affect the VoIP voice quality.

Cycle of Jitter and Jitter Buffer

Often the wireless connections experience issues like jitter. The codec sends the data packets with the same spacing between them. At the level of decompression, it is expected that all the packets arrive with the same order and same spacing between them. Nonetheless, since there are network delays at the packet, these packets might reach the decompression level at the different time interval and distorted. So, this affects the call quality of VoIP adversely. in order to remove this hassle, the jitter buffer induced to enable the calculated delay before transferring the packets for decompression.

Bandwidth problems and Network Parameters

Problems related to the quality of VoIP calls can get worse in case of a shared network. The network transmission quality reduces as the load on network increases. By giving voice packets high priority over the data packets the load on the network can be reduced. Other elements of voice communication like call success ratio (dial attempts: successful connects), call set up rate, call set up times are also significant determinants which impact the quality of call quality. The type of protocol which is used for instance H.323 or the SIP also affects VoIP’s performance since different processes are managed specifically by each of them.

Echo Issues

The conversion of the IP media into digital/analogy signals and vice versa is a significant part of the IP telephony. Because of this conversion, an echo is induced at different points in the network. Acoustic and Hybrid are generally the two types of echo which are generated in the network. In general, it is a heavy task to monitor the echo, however, there are some providers who offer echo cancellation at the gateway level where the conversion happens with the help of hardware and software modules.

Type of Codec

Each business environment with the VoIP/IP services applies an audio codec to compress the audio signal at one end and then decompress the signals at the other end. For instance, a number of the standardised codec’s are G.729a and G.723 etc. the quality of VoIP calls considerably depends on the type of codec which is deployed as greater the compression of data the lesser will be the size of data which is transported across the opposite end. The type of codec used also impacts the quality of VoIP calls. Majority of the codecs can hold up different target compression rates for instance 5.3 Kbps, 6.4 Kbps and 8 Kbps etc. additional CPU resources are needed in order to integrate the intricate codecs which in turn impact the quality of VoIP calls.

Incorporating outdated Equipment

Poor quality of VoIP call can also occur because of problems caused by an out of date router, firewall and cable modem. In such cases, the quality of the VoIP call can be enhanced by updating the router software or by replacing the equipment. By consulting a VoIP vendor can help you in recognising the issue that is associated with the quality of VoIP calls more competently and then manage them in a timely manner.


Majority of the problems that we have mentioned above can be resolved with the help of particular equipment and tools, removing any hassle which is related to the VoIP phone services. This, in turn, can ensure that nothing hinders the speed of the business processes and also helps in building a healthy working environment.