Systems for and method of identifying V.fast modem within existing automatic interworking procedure standards

A system for identifying and confirming communications between a calling modem and an answering modem, comprising:

• in said answering modem,
• means for using standard V.32/V.32bis interworking methods for identifying said calling modem as a V.32/V.32bis modem up and through a first standard V.32/V.32bis ranging sequence, and means for sending a V.fast identification signal to said calling modem after an at least sixteen baud silent time period which occurs after termination of said first standard V.32/V.32bis ranging sequence and before completion of an 8192 baud time period after said sixteen baud silent time period, wherein said V.fast identification signal is substantially different from a V.32/V.32bis S signal, and for detecting a V.fast confirmation signal;
• and
• in said calling modem,
• means for using said standard V.32/V.32bis interworking methods for identifying said answering modem as a V.32/V.32bis modem up and through a first standard v.32/V.32bis ranging sequence, and means for detecting said V.fast identification signal and for sending said V.fast confirmation signal to said answering modem in said 8192 baud time period after said sixteen baud silent time period;
• and
• wherein upon detection of said V.fast confirmation signal, said answering modem and said calling modem switch into a V.fast interworking protocol, but if said V.fast confirmation signal is not detected by said answering modem, then said answering modem and said calling modem continue with said standard V.32/V.32bis interworking methods.

A system for identifying and confirming communications between first modem and second modem, comprising:

• in said first modem,
• first means for using standard V.32/V.32bis interworking methods for identifying said second modem as a V.32/V.32bis modem up and through a standard V.32/V.32bis ranging sequence, and
• first means for sending a V.fast identification signal to said second modem after an at least sixteen baud silent time period which occurs after termination of said ranging sequence and before completion of an 8192 baud time period after said at least sixteen baud silent time period, wherein said V.fast identification signal is substantially different from a V.32/V.32bis S signal and first means for detecting a V.fast confirmation signal when said first modem is in an answering mode, and
• first means for detecting a V.fast identification signal from said second modem and first means for sending said V.fast confirmation signal to said second modem when said first modem is in a calling mode;
• in said second modem, second means for using said standard V.32/V.32bis interworking methods for identifying said first modem as a V.32/V.32bis modem up and through a standard V.32/V.32bis ranging sequence, and
• second means for sending a V.fast identification signal to said first modem after an at least sixteen baud silent time period after termination of said ranging sequence and before completion of a 8192 baud time period after said at least sixteen baud silent time period, wherein said V.fast identification signal is substantially different from a V.32/V.32bis S signal and second means for detecting a V.fast confirmation signal when said second modem is in an answering mode, and
• second means for detecting a V.fast identification signal from said first modem and second means for sending said V.fast confirmation signal to said first modem when said second modem is;
• and wherein upon detecting of said V.fast confirmation signal, said first modem and said second modem switch into a V.fast interworking protocol, but if said V.fast confirmation signal is not detected, then said first modem and said second modem continue with said standard V.32/V.32bis interworking methods.