[Freeswitch-users] recommendations for Wifi SIP phones?

[Karl Schmidt]

On 10/11/2013 09:02 AM, Michael Jerris wrote:
> Audio issues on wifi have nothing to do with the signaling protocol, they have everything to do
> with the codecs and other media features.

Not sure what you mean - it appears to mostly have to do with the nature of wifi - today's wifi only 
serves one client at a time - thus there are gaps that best case could be covered with large buffers 
and delay.  I did more tests just today with a Debian desk top and linphone as the client - works 
fine if the host is the only one connected. If you have a second host moving a data stream, it gets 
bad pretty fast.  The closer the AP and host the better it works as there is more bandwidth - but I 
could make things fail even at close range.

What I'm looking at is the ability for skype and Google voice to work where SIP does not.  I have a 
lot more tests to run. I've bumped into this claim several times.

( I did find confounding problems if zrtp was turned on with a client without support - this is even 
on 1000BaseT not wifi related )

I'm also reading that CISCO has APs that make SIP work better - might just be marketing hype - but 
could be careful sharing of bandwidth and QOS.


> My biggest issue with wifi based sip phones is the
> battery life sucks.

Even when the phone is used as a phone it is a problem - wifi tends to burn even more power.  I've 
wanted to make it work with something in the 7" format that would have more battery. Newer chipsets 
can use a lot less power if the drivers are right.


Don't bother w/ IAX2 its a solution looking for a problem.

That is what I've heard - but I do see some products supporting it - makes me think there is a 
reason. ( my searches did not find happy freeswitch users using IAX2 )


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