Voice and Video Design
|Minimum Primary Signal||-65dBm|
|Minimum Secondary Signal||-67dBm|
|Max simultaneous VoIP call par radio||15-20 (VoIP only network)
7-9 (VoIP and data)
When designing Wi-Fi, we position access points in order to meet our requirements and it is helpful to consider the requirements in the following order.
1) Primary Coverage
First, we place access points to meet our primary coverage goal. Making sure we have enough access points to meet your minimum signal strength in all required areas.
2) Secondary Coverage
Having designed for primary coverage, we will add additional access points to meet our secondary coverage requirements. It might be that secondary coverage is only required in certain areas, or only required over a certain percentage of the area, for example, we might decide that only 90% of our area needs to meet our secondary coverage
3) Signal-to-Noise Ratio & Co-Channel contention
Next we would assess our design against our other RF requirements such as Signal-to-Noise ratio, and co-channel contention. We then make any necessary adjustment, such as disabling 2.4GHz radios or changing an access point’s channel or transmit power. Remember: for every adjustment we make, we have to go back and check whether we still meet our primary and secondary coverage requirements.
Having met all our RF requirements, we then consider capacity. Do we have enough access points in each area for the number of users? This may result in additional access points being placed into our design. But again, every time we do this, we need to make sure we have not broken one of our previous requirements. For example, adding access points for capacity may result in more co-channel contention.