[asterisk-users] [OT] wi-fi ip phone scenario

[Alberto Pastore]

Andrew Joakimsen ha scritto:
> Are you using WDS? While it won't totally fix every issue, I've found 
> in my trials that turning off WDS and making sure all the AP were 
> connected to the same wired network was way more reliable, no more 
> random unregistartion and issue with registering (still seems to 
> unregister at times, but re-registartion won't require a reboot).
>
Nope.

I've a group of 12 indoor colubris access points + 2 outdoor ones,
and a msc5200 controller unit (the area
is quite wide with two 4-storey buildings, two 80000 sq.feet hangars,
one 40000 sq.feet outdoor parking lot)
no wds, all of them are wired to ethernet switches, no wireless bridging.
Diversity on all APs, automatic transimt power and channel selection
(that seems to work when monitoring devices).

I've tried linksys wip300/wip330, nokia e60/e70, utstarcom f1000/f1000g,
samsung wip6000.

The main problem (apart from firmware bugs/crashes which I hope
should be fixed on newer versions) is that phones tend to stick to
their associated AP even when it's clearly time to move to the
next AP: if you watch the phone's rssi indicator while you walk
inside the coverage area, you can see the value decreasing to
almost "no signal" before reassociating, which is unacceptable.

The only phones which seem to deal very well with it are the nokia
eSeries. Unfortunately they have many other major issues.
(two weeks ago I gave
3 firmware-updated e60 to my bosses to replace their cellphones
and after one week they almost threw them back to me, complaining
about the fact they had to reboot the phone at least twice a day
because it freezed...)

Also, on asterisk the qualify=2000 sip setting seems to be to low,
as the console shows repeated LAGGED/UNREACHABLE/REACHABLE notices
on those phones.

 From this experience I think wi-fi technology is not really mature enough
to replace dect right now. Maybe I'm wrong. At least I hope so,
my bosses are not really happy with the new system.