Computer telecommunications signalling interface
AssigneeDigital Systems Group, Inc.
InventorsDavid Callele, Donald Cruickshank
Life of this patent
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Abstract
A telecommunications signalling interface for computer systems is presented. Control and information signals from the telephone switch are received, decoded, and converted to a standard interface format for retransmission to the computer. Control and information signals from the computer are received and converted to a standard format for transmission to the telephone switch. The power supply for the device may be derived from the telephone network and the computer interface.
Claims45
A telephone interface for connecting a computer to a telephone line for use in telephone systems employing information signalling during the silent interval between rings comprising:
- line interface means for interfacing the telephone interface with the telephone line,
- first computer interface means for interfacing the telephone interface with a computer, and
- data demodulation means connected with the line interface means and with the first computer interface means for receiving data transmitted over the telephone line during a silent interval after a ringing signal,
- whereby in operation data present on the telephone line during the silent interval is retransmitted through the first computer interface means.
A telephone interface for connecting at least one telephone line to an external communications device for use in telephone systems employing information signalling during the silent interval between rings comprising:
- at least one line interface means for interfacing the telephone interface with the telephone line,
- external interface means for interfacing the telephone interface with an external communications device, and
- data demodulation means connected with the at least one line interface means and with the external interface means for receiving data transmitted over the telephone line during a silent interval after a ringing signal,
- whereby in operation data present on the telephone line during the silent interval is retransmitted through the external interface means.
Dependencies are inferred from the claim text.