At 11:58 PM 2/7/01, Santosh Koshy wrote:
>Thanks priscilla, that helped tremendously...
>If that is the case... then what is the most common L2 Encapsulation used
>when usually setting up a T1 link...(point to point)
>Is it safe to assume HDLC as that is the default encap on the cisco routers
HDLC is common for point-to-point links, but Cisco's HDLC is non-standard,
so if you were connecting to a non-Cisco router you would probably use PPP.
In many parts of the world, Frame Relay is the most common WAN
encapsulation, but it sounded like you were asking about point-to-poin
circuits, so that might not be relevant.
Priscilla
>----- Original Message -----
>From: "Priscilla Oppenheimer" <[EMAIL PROTECTED]>
>Newsgroups: groupstudy.cisco
>Sent: Wednesday, February 07, 2001 11:50 PM
>Subject: Re: T1 Link
>
>
> > Seeing that nobody had really addressed your question yet, I decided to
> > take a stab at it.
> >
> > T1 is a high-speed digital carrier facility developed by AT&T in the 1950s
> > to support long-haul pulse-code modulation (PCM) voice transmission. T1
> > provides digital voice circuits or "channels." There are 24 channels per
> > each T1 line or "trunk."
> >
> > AT&T describes their Digital Carrier System as a "two-point, dedicated,
> > high capacity, digital service provided on terrestrial digital facilities
> > capable of transmitting 1.544 Mbps. The interface to the customer can be
> > either a T1 carrier or a higher order multiplexed facility."
> >
> > So, what do you think? To send data on this do we need to encapsulate it?
> > You betcha, as Leo on TechTalk would say. That's why we have
>"encapsulation
> > frame-relay" and "encapsulation ppp," among others.
> >
> > Hope that helps a bit.
> >
> > Priscilla
> >
> >
> >
> > >On Wednesday, February 07, 2001 at 06:36:34 PM, Santosh Koshy wrote:
> > >
> > > > Pardon my ignorance here....
> > > > Is there such a thing as just a "T1 Link"...
> > > >
> > > > of what I understand T1 / Frac T1 resides in the physical layer....
>Dont u
> > > > need something at the Data Link Layer (such as Frame Relay) before you
>can
> > > > enable IP or IPX at layer 3....
> > > >
> > > >
> > > > _________________________________
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> >
> > ________________________
> >
> > Priscilla Oppenheimer
> > http://www.priscilla.com
> >
> > _________________________________
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