Hi everyone,
We use iPhones 5-6 for multiples applications(email,picture,video,browsing,intranet...) in our industry, the most crucial of them is the VOIP on our SIP system (old nec SV8100, we will change this system soon but it's working fine for now). My SIP client app is "Bria for iPhone", that's the best i found.
I got some support from aruba and from an external company to set this up and tweak it for iPhone only (802.11k 802.11r , client match ...). Right now i'm stuck because the power antenna on the iPhone is not strong enough compared to the wifi antenna, i know that iPhones are not made for entreprise VOIP on wifi but i want to see how i can help.
The main reason why i'm posting this here is because i don't have any tools. Not because i can't buy them, but because there's no professional apps on IOS to really analyse AP signals and roaming from a client perspective, there's nothing that can simulate iPhone/IOS roaming profile/power and finally SNR seems based on the device (iPhone) reception power and not the AP reception power.
This is resulting in a big problem, my users on iPhone can hear people well, but people have a lot of trouble hearing users on iPhone.
My solutions are ;
Lower APs power : doing it will reduce AP transmission zone so it will force the client to roam faster to another AP. ( i don't have any testing environement and i'm afraid that this will degrade conversation both way)
Lower heigh of my APs : our roof is 30+ feet , i was thinking about lower my APs down to around 20feet from the ground, this will reduce transmission zone of my AP and transmission power from iPhone will be better.
Adding more APs : this will reduce zone , add more roaming ... but cost a lot more
I know that my iPhone are client matching a lot , but is it working everytime , should they roam even more? iPhone are stuck with a threshold of -70db, i would like change this but i don't find anything talking about this even with jailbreak.