Week 13

VoIP over IEEE802.11 has a lot to offer.Whether small or large organizations, the importance of VoIP is very significant. Many organizations have start using VoIP as main communication between employees. 

There is a lot of factor to be consider in using VOIP

1. quality of voice
2. the medium used 
3. environment tested. 

Other factors include the distance between the Access Point and VoIP client, and the interference from other 2.4GHz device. All of these factors have significant impact on the performance of VoIP on IEEE802.11

The VoIP system has significant impact on VoIP performance for wireless LAN. The results presented in this study show that VoIP performance on 802.11b and is depending on the signal strength and the distance between the client and access point (AP). The result also shows the relationship between VoIP impairment such as delay, jitter and packet loss that affect the voice quality measurement of MOS and R-Factor score. 

In order to obtain the best quality of VoIP system, VoIP parameter such as delay, jitter and packet loss has to put into consideration and the parameter must be at the acceptable value. In order to achieve that, the access point must be installed in recommended area. 

The result, the range between VoIP client and Access Point must not exceed 65 meter. If the clients are located more than 65 meters, the call quality will drop significantly.