Telecommunications device with automatic code detection and switching

Claim 1

A method of operating a first telecommunications device so that it will automatically select one of two communication codes for communicating with a remote telecommunications device, a first code being preferred to a second code, the method comprising the steps of: (a) upon commencement of operation, the first telecommunications device creating a signal appropriate for communication in the first code and testing for a response from the remote telecommunications device in the first code for a predetermined period of time; (b) if a response is received in the first code by the first telecommunications device from the remote telecommunications device during the period of time, the first telecommunications device automatically setting its own mode of communication to the first code; (c) if a response is not received in the first code by the first telecommunications device from the remote telecommunications device during the period of time, the first telecommunications device automatically setting its own mode of communications to the second code, and (d) if communicating in the second code, during intervals between communications the first telecommunications device automatically creating a signal appropriate for communications in the first code so that communications can be automatically shifted to the first code if and when a proper response in the first code is received from the remote telecommunications device.

Claim 2

A method of operating a first telecommunications device so that it will automatically select one of two communication codes for communicating with a remote telecommunications device, a first code being preferred to a second code, the method comprising the steps of: (a) upon commencement of operation, the first telecommunications device creating a signal appropriate for communication in the first code and testing for a response from the remote telecommunications device in the first code for a predetermined period of time; (b) if a response is received in the first code by the first telecommunications device from the remote telecommunications device during the period of time, the first telecommunications device automatically setting its own mode of communication to the first code; (c) if a response is not received in the first code by the first telecommunications device from the remote telecommunications device during the period of time, the first telecommunications device automatically setting its own mode of communications to the second code, and (d) if communicating in the second code, during intervals between communications the first telecommunications device automatically creating a signal appropriate for communications in the first code so that communications can be automatically shifted to the first code if and when a proper response in the first code is received from the remote telecommunications device.

Claim 9

A method of operating a telecommunications device so that it will automatically select between Baudot code communication and ASCII code communication for communicating with a remote telecommunication device, the method comprising the steps of (a) transmitting an ASCII answer carrier tone, (b) testing for the receipt of an ASCII originate carrier tone; (c) testing for the receipt of information in Baudot code; (d) performing steps a, b and c repetitively for a predetermined period of time; (e) if no ASCII carrier is detected, or if information is received in Baudot code, the telecommunications device automatically setting its own communication code selection to Baudot code, and (f) if an ASCII originate carrier tone is detected, the telecommunications device automatically setting its own communication code selection to ASCII code.

Claim 10

A method of operating a telecommunications device so that it will automatically select between Baudot code communication and ASCII code communication for communicating with a remote telecommunication device, the method comprising the steps of (a) transmitting an ASCII answer carrier tone, (b) testing for the receipt of an ASCII originate carrier tone; (c) testing for the receipt of information in Baudot code; (d) performing steps a, b and c repetitively for a predetermined period of time; (e) if no ASCII carrier is detected, or if information is received in Baudot code, the telecommunications device automatically setting its own communication code selection to Baudot code, and (f) if an ASCII originate carrier tone is detected, the telecommunications device automatically setting its own communication code selection to ASCII code.

Claim 12

A method of operating a telecommunications device so that it will automatically select between Baudot and ASCII codes for communications with a remote telecommunications device with a preference for ASCII code, the method comprising the steps of: (a) transmitting and receiving information in Baudot code; (b) during intervals between transmission and reception of Baudot information, the telecommunications device automatically transmitting carrier tones appropriate to ASCII code communication and testing for a responsive tone; (c) if no responsive ASCII tone is received, the telecommunications device continuing to communicate in Baudot code; and (d) if a responsive ASCII tone is received, the telecommunications device automatically switching its own mode of communication to ASCII code.

Claim 13

A method of operating a telecommunications device so that it will automatically select between Baudot and ASCII codes for communications with a remote telecommunications device with a preference for ASCII code, the method comprising the steps of: (a) transmitting and receiving information in Baudot code; (b) during intervals between transmission and reception of Baudot information, the telecommunications device automatically transmitting carrier tones appropriate to ASCII code communication and testing for a responsive tone; (c) if no responsive ASCII tone is received, the telecommunications device continuing to communicate in Baudot code; and (d) if a responsive ASCII tone is received, the telecommunications device automatically switching its own mode of communication to ASCII code.