[asterisk-users] moving WiFi phone

[Tim Panton]

On 15 Feb 2007, at 09:54, Alberto Pastore wrote:

> Pavel Jezek ha scritto:
>>
>>
>> Jens Vagelpohl wrote:
>>>
>>> I have two APs (Apple AirPorts) sending on the _same_ channel.  
>>> Handover works perfect with no discernible loss of connectivity  
>>> or audio using a Siemens SL75. The handover cannot even be noticed.
>>>
>> as I know, best practice says, that neighboring AP should use _non  
>> overlapping_ channels... :-\
>>
>
> After *months* of troubles using a 14 APs network
> with same SSID, WPA/TKIP security model,
> tx power settings and channels carefully distributed
> in order to be as non overlapping as possible,
> including a controller capable of performing fast layer2  
> reauthentication
> (e.g. something like caching WPA keys between access points),
> I always got VERY POOR roaming performance. I've tested these phones:
>
> UTStarcom F1000
> UTStarcom F1000g
> UTStarcom F3000g
> Siemens Gigaset SL75 WLAN
> Nokia E60
> Nokia E70
> Samsung WIP6000
> Linksys WIP300
>
> I was desperate. I took a bold step.
>
> I downgraded to WEP-128 (I know it's weak) and, despite the
> recommendations from any good wifi networking guide,
> I SET ALL APs ON THE SAME CHANNEL.
>
> Don't ask me why, but now roaming is PERFECT, never had a call
> dropped or even a hiss or crackling noise during conversation.
>
> I can even run or
> move over the site hangar on forklift trucks while talking
> on the phone, at 15-20 mph.
>
> Luckily there are no high throughput demands for data transmission
> (PDAs, notebooks, etc) over the wifi network, so I didn't got
> performance issues.
>
> Imho roaming support on 802.11 wifi networks is far from being  
> usable...
>
>

The WAP54's have a 'repeater' mode which I've used on occasion.

Tim Panton

www.mexuar.net
www.westhawk.co.uk/