[Asterisk-Users] RE: Sipura SPA-841 Volume Oscillation Problem

[Robbie Hughes]

The firmware sipura are currently offering is pretty awful.
We bought 60 of these and our supplier in the UK was able to document  
and diagnose the problem. Sipura were then able to produce an updated  
firmware that made them sound almost like normal phones again. There  
is still a slight echo but the volume fluctuation and the echo during  
doubletalk is now gone. the version is 03-01-03-a-0623j.
You should be able to request it from sipura directly. If you can't,  
let me know and i'll have a word with my suppliers here.
robbie


On 8 Jul 2005, at 00:41, asterisk-users-request at lists.digium.com wrote:
> Hi all,
>
>
>
> The problem is on the volume of the voice sent by the SPA-841. I  
> think the
> echo cancel algorithm sets a limit to the microphone when detects  
> sounds or
> noise from the earphone. This problem generates an oscillation on  
> the voice
> volume sent by the phone and even turns it off completely for very  
> little
> lapses of time making the communication very uncomfortable. I  
> manage three
> different implementations with Asterisk and Sipura SPA-841 on  
> different
> clients and network topologies, and on every one we are  
> experiencing the
> same situation.
>
>
>
> Thanks,
>
> jergas