This is DSP-and-FAX in view mode; [Up]
Date: Sun 24-Aug-1990 18:53:48 From: Unknown Subject: DSP and FAX I considered using the DSP to emulate a fax modem, when I designed the Mirage Fax for NeXT. But in the end I decided against it, for a number of reasons: 1. The DSP may be used by someone else; Digital Eyes, Digital Ears, many other possibile candidates; 2. It's horribly complicated to try implementing the T.30 protocol in software; 3. You need specific approval from the phone company, to plug a piece of equipment into the phone jack. It would complicate product release date; 4. It's a formidabble piece of software to write, especially given the sketchy knowledge I have of the DSP; 5. The RS/6000s do not have any DSPs, and I want to make sure IBM RIOS machines are supported. So I ended up using RS-232 controlled fax modems in the end. There are still problems with this approach, but they are at least solvable problems. One problem still is fax modems raise the cost of the final package. Obviously a DSP fax modem would have the best price tag: nearly free. But I think for $895 ($795 to developers and academics), including the fax modem hardware, which also comes with 2400 bps Hayes compat. modem, the price is actually quite reasonable. -Robert Lin <rlin@cs.ubc.ca> Article 7548 of comp.sys.next: >From: aliao@eagle.wesleyan.edu
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