Re: (PM) PM4 (fwd)

MegaZone (megazone@megazone.org)
Thu, 18 Jun 1998 17:50:21 -0700 (PDT)

Once upon a time alex@nac.net shaped the electrons to say...
>Not only that, the PM-4 is ~$100 more per port than the PM-3, is only
>moderately more dense than the 5800 (which will change soon anyway), and

It is rather more dense than the AS5800. It also has a lot more growth
room than the AS5800. At first I wasn't mentioning this, but since so
many people have told me other Lucent reps are talking about it, expect the
PM-4 to support multiple T3s for dialin in time. DSP die size is shrinking
across the industry, AND *at the same time* these new DSPs support multiple
modems sessions in one die!

Two Cisco reps have straight up told me the AS5800 can handle 2 T3s on
its backplane, possibly 3 - but they don't recommend it. A PM-4 could
handle 2 T3s PER SLOT - and still have excess. You might even squeeze in
3 T3s per slot, but that'd be tight - the minimum backplane per slot is
155Mbps, but there is some overhead. A slot would be able to handle an
OC-3 (also 155Mbps) I would think. The AS5800 cannot. The PM-4 also
has a slot which has a 622Mbps interface - to handle an OC-12 - find another
chassis to do that in this class.

-MZ

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