Automatic modem identification system

Details Automatic modem identification system Automatic modem identification system

1978-11-17

1980-07-29

Moffitt, James W.

Boots, shoes, and leggings

364200, H04M 1100

Patent

active

042152437

ABSTRACT:
Apparatus for communicating between a number of remote use terminals and a central computer. The apparatus initially answers an incoming call under concentrator control, and transmits an answer tone to the calling terminal. The terminal user places the modem at the terminal in data mode. The apparatus detects which modem type called, conditions the concentrator port interface and connects an answering modem of the same type into the circuit between the telephone line and the concentrator port. The port automatically detects speed and code, and conditions the computer adapter clock and software appropriately to be compatible. The user experiences no change in existing connection sequences and only one telephone number is necessary for servicing a number of different modem types having common access to the computer.

REFERENCES:
patent: 3569943 (1971-03-01), Mackie et al.
patent: 3676858 (1972-07-01), Finch et al.
patent: 4000371 (1976-12-01), Ogawa

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