Re: (PM) pm3 disconnects

pmuser@minbar.taranaki.ac.nz
Tue, 30 Mar 1999 09:59:08 +1200 (NZST)

>
> Richard Morrell <portmaster@ednet.co.uk> wrote:
> > > Why do you need start or stop bits, which are usually sent to
> > > synchronise clocks?
> >
> > Nope, start and stop bits are usually just there to delimit the data that
> > you are sending down the pipe.
>
> Hmm, well in ISDN maybe. In the applications I have seen before, the start
> bit at least is to synchronise the clocks of the sender and receiver. I never
> quite worked out what stop bits were for.
>

One of us is suffering from a misconception. My understanding is that start and
stop bits pertained to asynchronous communications. The start bits are used to
indicate the start of a character and the stop bit the end, thus N,8,1 no
parity, 1 start bit, 8 data bits. ISDN being a digital service running over
a sychronous link would not use start or stop bits unless DOV does.

> > > Presumably PPP is the best protocol to tell our customers to use to connect
> > > to our PM3?
> >
> > Yes.
>
> Just to clear up any final confusion: if someone dials in using PPP, with
> PPP configured on their TA also, they are sending PPP frames inside PPP
> frames?
>
> Cheers
>
>
> Jon
> --
> \/ Jon Ribbens / jon@oaktree.co.uk
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