Performance Issues using Neo wifi and WPA2

john dowd jdowdster at
Tue Dec 30 17:21:01 CET 2008

I'm wondering if someone could verify the following SIP interaction
between linphone and the s/w PBX that I'm running.

The Neo registers (using linphone) with the PBX and I can see the
registration happening but then there is a "REQUEST NOTIFY" coming
from the PBX to linphone. Linphone responds with a "481: Subscription
does not exist". I've attached this interaction in the tcpdump
formatted file and I'm hoping someone would look at it. What I think
is happening is that the PBX is actually informing linphone that there
are some voicemail messages waiting but linphone does not support this
feature and does not know what to do with this part of the protocol.


On Fri, Dec 19, 2008 at 10:25 AM, Al Johnson
<openmoko at> wrote:
> On Friday 19 December 2008, john dowd wrote:
>> I have a Neo freerunner running the 2008.9 load. I have it configured
>> to connect using Wifi to my access point using WPA2 encryption. I do
>> NOT have a SIMM card in my phone.
>> I have managed to make a connection to the PBX sitting on the other
>> side of the Access Point. However, the audio that I'm getting is so
>> badly broken that it's incomprehensible. I have seen the CPU
>> utilization going to 78% using top (not a good way to measure I know).
>> What I'm wondering is, does the Neo have the horsepower to be able to
>> do this? Is this just an optimization problem that can be addressed or
>> am I pushing the phone beyond it's ability.
>> Cheers!!
> I have made SIP calls using the linphone CLI over wifi with WPA-TKIP and the
> audio quality was fine. I don't recall which codec it was using, but the
> Freerunner is certainly capable of making high quality SIP calls over
> encrypted wifi.
> _______________________________________________
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                              John Dowd
                              jdowd at
                              133 Waverley St.
                              Ottawa Ont. K2P 0V3
                              Home: (613)234-7884
                              Cell: (613)316-7884
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