[OpenSIPS-Users] codec manipulation feature

[Brett Nemeroff]

Jeff, I hadn't thought of those scenarios.. I suppose with the dialog module
you can do some pretty neat stuff.. this is a great idea..


On Tue, Jun 16, 2009 at 9:03 AM, Jeff Pyle <jpyle at fidelityvoice.com> wrote:

> Hi Raúl,
>
> It comes down to the service we're offering.  When a customer buys a PRI
> from us, they don't care or even know in many cases it's driven by VoIP.
> They're buying a PRI -- they expect PRI quality.  It is my opinion that
> G.729 does not provide that quality.  But, I also do audio production, so
> I'm probably a bit more sensitive to it than most folks.  Personally I
> can't
> stand the way it sounds... like a cell phone.  (I can't stand satellite
> radio for the same reason.)  There's nothing wrong with our particular
> implemenation of G.729; that's just how it is.  So, our rule is G.711
> wherever possible because it provides the service our customers expect.
>
> Oh, and we're also the ISP selling the T1s in many cases.  :)  T1s are
> quite
> common because the DSL service sucks in this area, and we can usually bring
> the price of a T1 down to where it makes sense for the customer.  6mb/768kb
> is a common high-end speed DSL here.  It's common for the downstream to
> drop
> below 2mb when it rains.  Yes, it's that bad.  We simply cannot guarantee
> the quality on DSL as we can on a T1, where we have QoS egress control on
> both sides.  Again, back to service quality.  If anything I'd pick cable
> over DSL.  It's available in most areas although the installation cost may
> be more.
>
> It would be very nice to provide a "mostly" uncompressed PRI, compressing
> only when volume dictates.
>
>
> - Jeff
>
>
>
> On 6/16/09 8:43 AM, "Raúl Alexis Betancor Santana"
> <rabs at dimension-virtual.com> wrote:
>
>
> > Just as a comment ... if you have very bad quality with G.729, maybe your
> > problem is on other place.
> >
> > Having T1 line's for data, just for putting VoIP traffic ast SIP+G.711 is
> a
> > waste of bandwidth, but that just my opinion.
> >
> > Our customers uses ADSL lines ranging from 3Mb/320Kb to 10Mb/1Mb, and
> using
> > the same line for Inet navitation + VoIP, over a 3M/320Kb line you could
> > drive 5 G729 calls without any problem, and over a 10Mb/1Mb line, more
> than
> > 12 ... so I don't undestand where you have problems with a 1.5Mb/1.5Mb
> line.
>
>
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