Re: Digital Modems

Richard Yoo (ryoo@cymitar.net)
Tue, 17 Sep 1996 20:32:30 -0500

At 06:14 PM 9/17/96 -0700, you wrote:
>The USR Courier and the Livingston use a DSP chip to implement the modem in
>*software* (can you say firmware update?). The advantage of this is faster
>turn around times for new feature implementations and bug fixes. If rockwell
>discovers a bug in a critical portion of their chip, they have to spin a new
>revision. Three months would be an optimistic guess for the time involved.

First off, I am no "guru" about the new PM3's...

However I would think that Livingston would have a problem with you
comparing their DSP modems with the USR Courier... I would think that the
DSP built into the new PM3 modem cards would have an advantage since there
will never, ever be any analog conversion until after it leaves the NOC.

Although I do agree the DSP may be underpowered for future standards, I
don't think they are even in the same league as the USR modem. That would
be like comparing a rockwell modem, a TrueDigital modem, and a USR Courier
as a pickup, Big Rig, and a Big Rig with an automatic transmission
(respectively.)

YMMV,
-Richard

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