Not exactly
PPP seems to be the protocol chosen for the link between the
modem and the exchange. It is used, in this case, amongst other
things to assign the IP address. Whether that IP address is
static or dynamic depends only on what the RAN assigns (or is
able to assign). For example Dan still has the same ip address
but mine and Stephen's keep changing (My feeling is that everyone
else's keeps changing) Whether it is static or dynamic appears to
be a limitation on the he RAN with multiple ISPs if I have been
following correctly.
On the other hand (OTOH) billing I have been given to understand
is based on a <quote>port</quote> on the RAN. That is it is tied
to the circuit presumably at the ATM layer that runs from the
modem to the Redback. Whether this is equivalent to vcc1 or is
closer to a direct correspondence with you copper pair I am
unclear on. The context was the question
<quote>Can you get a second 300 Mb if you have a second login
ID?</quote>
The answer was no. (at that time)
the reason give was that the traffic was measured at said port.
The implication was that the traffic was measured below the ppp
layer. The follow up question on what was actually billed
elicited the response
IP traffic not the ATM level which has up to 40% overhead or
something to that effect.
I hope this may add something to the conversation
-- kit

Harold Jarvie wrote:
>
> My understanding is that if you are not prepared to give a static IP (for
> whatever reason) you use PPP. That way you interface to the same (ie
> already existing and payed for) security (PAP) and accounting system
> used by the dailup users. This is what I was trying to find out more
> about in the meeting when I was asking about PPP....
>
> > Can telecom even guarantee accuracy? for the first few weeks i was logging
> > hours... Second according to the RAN my IP is 210.55.118.30 and has been
> > for 2 +weeks, if its what they think I have news for them its only been on
> > that IP for 4 days if telecom cannot keep track of my IP via the RAN how
> > can they bill?. If the accounts program pulls off the RAN then its obvious
> > there is a good chance the bill is incorrect. My volume is about 340meg
> > this month which due to the fact I lost one weekend total use plus all 4
> > weeks days due to their outages as i couldnt find my box is what i would
> > expect...i think.
>
> ________________________________________
> Harold Jarvie
> Wellington
> New Zealand
> hjarvie@bigfoot.com
> http://bigfoot.com/~hjarvie
> ________________________________________
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Received on Sat Jun 19 19:49:04 1999