mikec@reed.UUCP (Michael Cooper) (11/15/84)
[ This line is offered as a sacrifice so that others may live... ]
I am interested in building a 1200 buad modem either from a kit or
just from a design. I know of many 300 buad designs and kits, but no
1200 buad versions. This is probably because the 1200 buad modems
encompass an entirely different design. Does anyone have a 1200 buad
design/kit they could send me? Or even the address of some place to
contact. Any info on costs and difficulties of building such a modem,
would also be apprecciated.
Michael Cooper
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mit-ems, psu-cs, uoregon, orstcs, ihnp4, uf-cgrl}!tektronix--+
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---^----^----^----^----^----^----^----^---andrew@orca.UUCP (Andrew Klossner) (11/17/84)
[You see this line. That's because it starts in column one.] "I am interested in building a 1200 buad modem either from a kit or just from a design ... Any info on costs and difficulties of building such a modem, would also be apprecciated." A big difficulty is that you aren't allowed to hook the modem to the telephone network until it's been certified by the FCC. This isn't something that an individual does on a hobby project; it takes the resources of a company that's designing modems for a profit. If you do hook up your modem without permission, and it brings down some of the network, the phone company will Own Your Soul. You're liable for the entire cost of repair, including labor, and may find yourself brought up on criminal charges. -=- Andrew Klossner (decvax!tektronix!orca!andrew)
darrelj@sdcrdcf.UUCP (Darrel VanBuer) (11/19/84)
While the process for getting an approved phone line interface is indeed
arduous, you can by approved "black box" line interface which meet the
requirements for you. There are (1) full blown DAAs at $100 to $150
(2) small modules designed to be built in to modems (aimed at small
manufacturers or small lots to avoid certification hassles).
This is the easy part of building a 1200 bps full duplex modem.
--
Darrel J. Van Buer, PhD
System Development Corp.
2500 Colorado Ave
Santa Monica, CA 90406
(213)820-4111 x5449
...{allegra,burdvax,cbosgd,hplabs,ihnp4,orstcs,sdcsvax,ucla-cs,akgua}
!sdcrdcf!darrelj
VANBUER@USC-ECL.ARPAyamauchi@fortune.UUCP (Alan Yamauchi) (11/19/84)
In article <1170@orca.UUCP> andrew@orca.UUCP (Andrew Klossner) writes: > > "I am interested in building a 1200 buad modem either from a > kit or just from a design ... Any info on costs and > difficulties of building such a modem, would also be > apprecciated." > >A big difficulty is that you aren't allowed to hook the modem to the >telephone network until it's been certified by the FCC. This isn't >something that an individual does on a hobby project; it takes the >resources of a company that's designing modems for a profit. > . > . > . > -=- Andrew Klossner (decvax!tektronix!orca!andrew) Somebody correct me if I am wrong, but I believe you can build a direct connect modem without going thru FCC certification; however you must use an FCC certified DAA to do so. Off hand, I believe Cermetec and Novation build FCC certified DAA's, there are probably other manufacutrers also. Anyway, the DAA's are EXPENSIVE in single unit purchases, they aren't even cheap in 100,000 unit pricing. It may be cheaper and less headache to buy a modem than build your own. Good Luck! Alan Yamauchi UUCP: {ihnp4,ucbvax!amd,hpda,sri-unix,harpo}!fortune!yamauchi DDD: (415)594-2436 USPS: Fortune Systems Corp, 101 Twin Dolphin Drive, Redwood City, CA 94065