System and method for providing universal access to voice...

Telephonic communications – Supervisory or control line signaling – Substation originated

Reexamination Certificate

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Details

C379S353000, C379S361000, C379S362000

Reexamination Certificate

active

07110530

ABSTRACT:
A present invention comprises a device and method for monitoring dial pulse (DP) signals on a line and recognizing a digit pattern comprising at least one digit on the line. In response to the recognized digit pattern, the invention determines when to initiate transmission of DTMF signals corresponding to dialed DP digits and initiates the transmission of DTMF signals at the determined point in time, which may be immediately or after a predetermined number of dialed digits or after a predetermined dialed number.

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“Pulse to Tone Conversion” by John Jainschigg; Teleconnect Oct. 1996; pp. 92-96.

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