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List:       cisco-nsp
Subject:    [nsp] RES: [nsp] RES: [nsp] Asynchronous E1
From:       "Loureiro, Rodrigo" <rodrigo.loureiro () netstream ! com ! br>
Date:       2000-04-19 13:55:54
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Actually, this is a way of name an unframed line in the SDH configuration.
The connection continue to use the SDH clock (synchronous), but when it is
not using frames we use to call it "asynchronous" or unframed.

-----Mensagem original-----
De: Alfredo Sola [mailto:alfredo@intelideas.com]
Enviada em: Quarta-feira, 19 de Abril de 2000 06:48
Para: Loureiro, Rodrigo
Cc: cisco-nsp@puck.nether.net
Assunto: Re: [nsp] RES: [nsp] Asynchronous E1



> I think if we are operating in unframed mode, the medium become
> asynchronous, so we canīt do the mapping suggested below, because there
> isnīt any time-slots.

	One thing is framed/unframed and another thing is
synchronous/asynchronous.
The medium will still be synchronous even if unframed. If you run unframed,
then you can define timeslots at your will (well, they still need to be 32
of
them 64 kbps "long" each, but you can group them as you need), but you will
still be using a synchronous line on which both ends work in sync (which is
where the clock source stuff comes in) rather than syncing on each character
or so (which is what start/stop bits are for).

> -----Mensagem original-----
> De: Jesper Skriver [mailto:jesper@skriver.dk]
> Enviada em: Terįa-feira, 18 de Abril de 2000 17:00
> Para: Alfredo Sola
> Cc: Simon Lockhart; Loureiro, Rodrigo; cisco-nsp@puck.nether.net
> Assunto: Re: [nsp] Asynchronous E1
> 
> On Tue, Apr 18, 2000 at 09:53:24PM +0200, Alfredo Sola wrote:
> >
> > > >Does anyone know if i can use Cisco 3620 E1 port in asynchronous mode
> to
> > > >routing data?
> >
> > > s/asynchronous/unframed/
> >
> > > No, I don't think you can do this. For all our E1's we use external
DSU
> > > and a serial port (X.21).
> >
> >       I am using an NM-2CE1U for an E1. For instance, this setup will
give
> you 1984
> > kbps (timeslot 0 unusable as of this hw and IOS 11.3(10)T:
> >
> > controller E1 0/0
> >  framing NO-CRC4
> >  channel-group 0 timeslots 1-31
> 
> You can also use
> 
>   channel-group 0 timeslots 0-31
> 
> If it's a unstructured E1 the telco provide.

--
Alfredo Sola
Administrador del sistema

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