David C. <shaminotechie.com> wrote:
I'm not so sure about that last sentence. V.90 in fact does make use of> mu-law vs. a-law is a function of what the phone company uses on the
> digital trunks. Your modem connects to an og circuit and so
> isn't involved in this.
the fact that the subscriber is connected to a digital switch, and it
has to make use of the digital-og conversion internals. Otherwise
with the bandwidth of an og line we would be limited to V.34. For a
strictly og connection with the voice quality bandwidth (spectrum)
available, 33600 bps basically is almost the theoretical limit.
At least Apple's V.90 modem (and I'm sure many others as well) has some
settings of assuming either a-law or mu-law og/digital conversion
facilities. What I'm wondering is whether this has to be set manually or
whether it is detected automatically by the V.90 protocol.normal V.90 modems cannot even run as server side modems (if you try>
> If you are running the server side of a 56K connection (which is
> attached to a digital telco circuit) then it would make a difference.
V.34 is the most you get). On the other hand, you are right, for V.90
server side equipment it surely does make a difference.
I assume if I don't get a V.90 connection the modem falls back to V.34.> But the result of using the wrong encoding would be no connection at
> all, not a reduced-speed connection.
This is what I get.
Georg Schwarz [url]http://home.pages.de/~schwarz/[/url]
[email]geosepost.de[/email] +49 177 8811442