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Archive for the ‘Commodore Modem’ Category

Commodore VIC Modem Model 1600

August 30th, 2013 1 comment
Commodore VIC Modem Model 1600

Autopsy:

from Zimmers homepage:

The Commodore 1600 was an extremely prolific and inexpensive modem, introducing millions of computer users to the online world. Marketed to the VIC-20 user, the “VICMODEM” as it was nicnamed, operated in an extremely strange manner.

Instead of connecting to the phone line directly, the VICMODEM relied on a connection THROUGH the phone to the handset. One would dial the number they wished to connect to, then remove the extension from their handset, plugging it into the modem after a carrier signal is heard.

Some customers in Canada were lucky enough to get their VICMODEM packaged with this telephone manufactured in Canada by Northern Telecom. Ironically, the phone did not have a detachable handset, making it useless by itself for use with the modem. Therefore, the set also included a small adaptor which allowed one to plug the VICMODEM directly into the wall line cable, daisy chained to the phone. After dialing with the phone, a switch on the adaptor would redirect the carrier signal to the modem.

Download: Commodore VIC Modem Model 1600 Manual (542)

source: zimmers.net

Commodore Modem Model 8010

May 12th, 2009 6 comments
Commodore Modem Model 8010

autopsy:

This is my first Modem, this is a Acoustic coupler modem for Commodore PET but i could use it with a IEEE488 Interface for the Commodore 64.

Description:

  • Country: USA
  • Most Common: Usa
  • Rarity: Rare
  • Year: 1979-1983

from Wikipedia:

Prior to the deregulation of telephony in many countries of the world, it was illegal to make an electrical connection to the telephone network. Also, in many households, telephones were hard-wired to wall terminals before connectors like RJ11 and BS 6312 became standardised.

With the increased use of computing, acoustic couplers were used to connect modems to the telephone network. Speeds were typically 300 bits per second, achieved by modulating a carrier at 300 baud. The first such device was the ACOUSTIC DATA COUPLER 300 MODEM from 1968. The practical upper limit for acoustic-coupled modems was 1200-baud, first made available in 1985 with the Hayes Smartmodem 1200A.

source: wikipedia