By David Patterson


IP phones use voice over IP technologies to place and transmit phone calls on an internet protocol network instead on the PTSN or public switch telephone networks. Common functionality and features include call hold, conference and transfer as well as caller ID. Though there are issues with this technology including the need of internet access and depending on mains electricity.

Another issue it has is the voice quality suffers whenever other applications are using and accessing the network that the call is also using and accessing. QoS IP phone systems are essential in managing data traffic because of this reason. Quality of service or QoS is the concepts and techniques collection in providing optimal call quality.

This is a service that arranges particular traffic by slowing data packets down with lesser importance for the important one to arrive at their destination faster. Routers usually use a First In, First Out or FIFO method when sending data but it can be changed with QOS tagging. Changing it would give priority to certain traffic and move them up the queue.

The queues hold containers of packets for network devices whenever they have low priority and cannot be immediately sent. There are different methods and levels in prioritizing these tags and are dependent on the router. Some samples of these levels include high, medium and low. Tagging is possible by using Ethernet ports of the router.

The router for QOS implementation placed in the local are network as gateway device after the modems of cable and DSL. This can reduce the experience of having choppy voices during the conversation because of other applications seizing the bandwidth needed. These applications including email, games and other high bandwidth apps.

The performance you are receiving from your ISP is not affected with this because the limitations of your upload and download was already set by them depending on the service level. Do some speed test measurement and compare the result with the information given by your ISP. If the result does not reach eighty percent of your limit cap then have their tech support help you in troubleshooting this issue.

Do these first before putting the QoS settings on a router when you are still experiencing choppy voices. First step is try talking on the IP phone and without competing computer and phones then check if the same problem is there still. Check all the computers connected to the LAN if they do not have any spyware program by checking with some protection software.

You must put the settings individually and check each time if they work or achieved the desired results. The simple ones should be added first then the others in increasing level of how advanced the settings are after checking them individually. Experiment which one of them to use until the desire result is achieved.

Your networking equipment can also affect the voice quality and is critical in have a good phone conversation. This is not a big problem in companies that have fewer employees because the active users are fewer and lesser simultaneous use of network. While in bigger companies with more employees will have many active users specially if on a computer that are transmitting all kinds of data simultaneously.




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