Re: (PM) Line1 to Line1 (or maybe just a dumb question) (fwd)

Kyle Platts (kwplat1@uswest.com)
Wed, 24 Jun 1998 09:43:25 -0500

MegaZone wrote:
>
> Once upon a time Mark Radabaugh shaped the electrons to say...
> >We are planning on setting up a system using 2 pm-3's tied together with T1
> >between the two line1 ports of the unit. The question came up of who would
>
> Back to back - that will not work, because...

It *will* work, but there will be slips on the span.
>
> >provide the clocking for the T1 line. I have heard two different opinions
> >on the subject - one being that it won't work as there will be no clock and
> >the other that the telco providing the T1 provides the clock for both ends
> >of the line. Anyone care to enlighten me on this one?
>
> If there is a telco in the loop, THEY have to provide the clock. If you are
> talking a T1 crossover cable, that doesn't work. You need a telco, or a
> telco line simulator.

You are batting a 1000 in the wrong direction MZ. Telcos are actually
transparent to the span. the end equipment is responsible for overall
timing on a point to point link.
>
> Unless you were talking the new WAN card, that can generate clock. (See,
> people asked, they did it.)

Now if they could fix the line build out feature on the WAN card....

-- 
Kyle Platts
Network Engineer
!NTERPRISE Networking Services
U S WEST Communications
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