[BUGA] Documenting how ADSL modems work?

[Daniel O'Connor]

On Wednesday 07 September 2005 16:19, Greg 'groggy' Lehey wrote:
> Specifically, a lot of terms are mentioned: RFC 1483 bridged and
> routed modes, VPI, VCI, UBR, raw bridges, and many more.  I can find
> some of this stuff in mulitple different places (like RFC 1483, for
> example, which makes your eyes go funny, which states that it's
> obsolete and which doesn't really talk about how the modems implement
> it), but I can't find any in-depth documentation that explains how it
> all fits together.
>

As I said on IRC.. I treat my ADSL modem like a magic box that gives me an 
ethernet port on the Internode network..
I don't know how realistic this perception is though :)

VPI and VCI are options for the modem to deal with when it does it's magic - 
sort of like in a serial modem (which I think of as a really long null modem 
cable..) has options for modulation control etc.

> Further issues are that I'm running an IP-IP tunnel, and that I want
> to run VoIP.  I've worked out some things about IP-IP tunnels (and how
> they differ from GRE tunnels), but the documentation I've found about
> VoIP, especially in this context, is pretty minimal.  If anybody can
> point me to a good tutorial introduction, I'd be grateful.

Why do you want to use an ATA built into your DSL modem? For QoS reasons?

-- 
Daniel O'Connor software and network engineer
for Genesis Software - http://www.gsoft.com.au
"The nice thing about standards is that there
are so many of them to choose from."
  -- Andrew Tanenbaum
GPG Fingerprint - 5596 B766 97C0 0E94 4347 295E E593 DC20 7B3F CE8C
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