Seller assumes all responsibility for this listing. This was not simple unless the modem “knew” what data were initially being sent, allowing it to time the bits and thereby guess the speed. Sirkis acquiesced, and a working prototype was soon complete. When this was received from the computer, the modem would switch from data to command mode. They remained a major vendor throughout the s, periodically introducing models with higher throughput. Such modems had access to the computer’s main memory, and by dedicating certain memory locations or registers to various status readouts or commands, software programs running on the computer could control the modem. Max Fax Transfer Rate.

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Includes power cord and phone cord. Box has wear and some damage, see pictures.

Connection Type see all. Got one to sell? Heatherington retired from what was then a large company in For parts or not working. At the time, Hayes was one of the few modem companies with the capital and engineering wherewithal to develop entirely new modem architectures. Within 2 miles 5 miles 10 miles 15 miles 20 miles 50 miles 75 miles miles miles miles miles miles miles miles miles of.

No way to fully test.

Hayes 5345US Optima 336 V.34 Fax Voice External Modem

Delivery time is estimated using our proprietary method which is based on the buyer’s proximity to the item location, the shipping service selected, the seller’s shipping history, and other factors. All Auction Buy It Now. Since we have many of these listed you may not get the unit pictured. In an attempt at diversification in January it had acquired most of the assets of local area network software developer Waterloo Microsystems Inc of Waterloo, Ontario and belatedly entered the operating system OS market in June with LANstep, a network OS for small offices, but this was subsequently abandoned in in the face of stiff competition particularly from Novell NetWare.


Delivery times may vary, especially during peak periods. You are considering a Hayes Accura flash external modem.

Hayes OPTIMA Business Modem

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Resume making your offerif the page does not update immediately. The problem was how to move from mode to mode.

Item Location see all. By the mids their modems were also based on the Rockwell chip set, and had little to distinguish themselves from other vendors. Modem companies quickly incorporated v. At the time, modems generally came in two versions, one for the end-user that required the user to dial the phone manually and use an acoustic coupler for connection, optiima another dedicated to answering incoming calls that was intended for hayed on the minicomputer or mainframe the user was calling into.

Hayes Microcomputer Products – Wikipedia

They then split their line into the Accura and Optima brands, offering the Accura as a low-cost model, although the feature sets were not that different between the two lines. There needed to be some way to indicate that the characters flowing out from the computer to the modem were not simply additional data to be sent to the far end, but commands to be acted on.


Skip to main content. The modem would normally start up in command mode. They remained a major vendor throughout the s, periodically introducing models with higher throughput. What was needed was a single modem that could do it all; connect directly to the phone, answer incoming calls, dial numbers to initiate outgoing calls, and hang up when the call was complete. Interest will be charged to your account from the purchase date if the balance is not paid in full within 6 months.

Hayes US Optima V Fax Voice External Modem | eBay

Comes with original box. A widely circulated history of computing states that the Smartmodem was introduced in Sirkis optoma, and a working prototype was soon complete.

This could be addressed in internal modems that plugged directly into the computer’s motherboard. Hayes Smart Modem in very good shape.

Modified Item see all.