[Freeswitch-dev] FreeSwitch + ISDN + analog phone adapters - status

[Anthony Minessale]

I think the goal would be to reduce the number of trips to and from
userspace by doing the multiplexing in userspace to avoid the context
switches of reading every logical channel as a device.


On Fri, Jan 30, 2009 at 4:45 PM, Jan Berger <janvb at live.com> wrote:

>  What do you want to achieve by moving the entire span up in user space
> unprocessed?
>
> Jan
>
> > From: hselasky at c2i.net
> > To: freeswitch-dev at lists.freeswitch.org
> > Date: Fri, 30 Jan 2009 18:11:09 +0100
> > Subject: Re: [Freeswitch-dev] FreeSwitch + ISDN + analog phone adapters -
> status
> >
> > On Friday 30 January 2009, Michael Jerris wrote:
> > > Another useful advantage without the latency tradeoff is to read a
> > > full span or card every 1ms (or whatever sane interval) and chop up
> > > the bytes in userland. The latency argument dies if you are bridging
> > > to voip, so if you can handle bridging the tdm to tdm channels in
> > > kernel space, you could easily get away with 10ms reads to user space
> > > as well.
> > >
> > > Mike
> >
> > Hi,
> >
> > Got your point.
> >
> > In between:
> >
> > I see more in Jan's argument. 48x30 bytes = 1440 bytes, which is an
> > interesting size for full span E1.
> >
> > --HPS
> >
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>
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-- 
Anthony Minessale II

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