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QoS IP Phone Systems Essential Details

By David Patterson


IP phones uses voice over internet protocol technologies for transmitting and placing phone calls on the IP network instead of the public switched telephone network or PSTN. Common functions and features include caller ID, call transfer, hold and conference. Though this technology has issues like it requires internet access and is dependent on the mains electricity.

One other issue is that voice call quality suffers if other applications are also accessing and using your network which the call also requires accessing and using it. This is why the QoS IP phone systems are an important part in managing traffic of data. Quality of Service is a collection of techniques and concepts to provide best call quality.

The service arranges specific traffic by slowing down lesser important data packets so that the important ones reach the destination quicker. Routers are using the FIFO method to send data though this may be changed through QoS tagging. This will give priority by changing it over to specific traffic and they will be moved up the queue.

Queues hold packs of data packets for network devices when they cannot immediately be sent and have low priority. The tags are prioritized by different methods and have different levels depending on the router. Examples of these levels are high, medium or low. Tagging can be done using the Ethernet ports of a router.

That router used for implementing QoS must be placed inside the LAN as the gateway device after the cable and DSL modem. The experience in having choppy voices while on a conversation, which happens when other applications grab the needed bandwidth, could be reduced by this. These applications are other high bandwidth ones like email and gaming.

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.

Before putting QoS settings on your router, these steps must be done first if you are experiencing choppy voices. Try to talk using the IP phone without the other competing phones or computers and check if there is still a problem. Check the computers on LAN if they are clean of spyware programs by using a protection software to check them.

You should put the settings one by one and check if they work and achieve the wanted results each time. The simple ones must be added first and add the others after checking them one by one dependent on how advanced they are. Experiment with which settings to use until you can achieve the desired results.

The networking equipment are critical for having a quality phone conversation and affect the voice quality as well. Companies with few employees do not need to worry much about this because they only have few users. Bigger companies have much more users who are using the network simultaneously making this their problem.




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