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- Path: sparky!uunet!cs.utexas.edu!sun-barr!ames!network.ucsd.edu!ucsbcsl!spectrum.CMC.COM!lars
- From: lars@spectrum.CMC.COM (Lars Poulsen)
- Newsgroups: comp.dcom.modems
- Subject: Re: PCMCIA Modems?
- Message-ID: <1992Dec12.175234.3374@spectrum.CMC.COM>
- Date: 12 Dec 92 17:52:34 GMT
- References: <2340002@otter.hpl.hp.com>
- Organization: CMC Network Systems (Rockwell DCD), Santa Barbara, CA, USA
- Lines: 35
-
- In article <2340002@otter.hpl.hp.com>
- cgr@otter.hpl.hp.com (Chris Romans) writes:
- >What is available in the way of modems on PCMCIA cards?
- >Does anybody have any experience of using PCMCIA card modems?
- >
- >They sound a great idea, but the only information I've seen was on a
- >modem from AT&T Paradyne which whilst it had high functionality was also
- >expensive.
-
- PCMCIA cards are tiny, and it seems that there just isnt room for enough
- conventional surface-mount parts in the amount of space on the card.
- The solution for now is to put the naked silicon on the board and epoxy the
- whole thing. This has several implications:
-
- - new fabrication technology. Steep learning curve. Expensive. Mostly,
- the small to medium size companies have difficulty ramping up, and the
- chip and hybrid manufacturers usually are not organized to sell into
- the board and box market. I.e. while Rockwell has a factory that is
- almost ideal to build this in, they are reluctant to start selling
- products that would compete with their customers'. And Zoom, Zyxel,
- Supra, Lightning etc etc may be reluctant to get into expensive "clean
- room" manufacturing,
- - With the whole board being one hybrid package, you can't rework boards
- that fail in post-assembly test; you have to scrap the whole thing.
- Especially in the early part of the learning curve, this is expensive.
- - No more socketed EPROMs: No more field upgrades, unless you take the
- Intel approach and put the microcode in RAM.
-
- There is no doubt that PCMCIA is going to be big, but for the time being
- it will extract a price premium, and you wont use them unless you _have_
- to.
- --
- / Lars Poulsen, SMTS Software Engineer Internet E-mail: lars@CMC.COM
- CMC Network Products / Rockwell Int'l Telephone: +1-805-968-4262
- Santa Barbara, CA 93117-3083 TeleFAX: +1-805-968-8256
-