Telephone dialling code processor

A telephone having a device for selectively blocking signals from passing out from the device and along a telephone line, the device being powered from the telephone line, comprising a telephone dialling code processor for connection to a telephone line between a telephone network and a telephone terminal having a dialler;

• the processor processing an original dialling code produced within the telephone terminal, said processor comprising:
• muting means comprising a solid state circuit for selectively blocking low voltage AC signals of a type used as dialling codes from passing along said telephone line, while simultaneously passing direct current telephone power and passing high voltage AC ring signals, said muting means being powered from said telephone line,
• dialling code generating means, within said dialling code processor, for generating at least one dialling code,
• comparison means for comparing original dialling code with at least one table of preloaded combinations, and
• decision means for using results of the comparison to control the muting means and the dialling code generating means
• wherein the original dialling code is completely suppressed and a modified dialling code, if any, sent on to the telephone system, is entirely created by the dialling code generating means.

A telephone dialling code processor for connecting to a telephone line between a telephone network and a telephone terminal having a dialler;

• the processor processing an original dialling code produced within the telephone terminal, said processor comprising:
• a dialling code muting means comprising a solid state circuit for selectively blocking low-voltage AC signals of a type used as dialling codes from passing along said telephone line while simultaneously passing direct current telephone power and passing high voltage AC ring signals, said muting means being powered from the telephone line,
• dialling code generating means, within said dialling code processor, for generating at least one dialling code,
• comparison means for comparing original dialling code with at least one table of preloaded combinations, and
• decision means for using results of the comparison to control the muting means and the dialling code generating means to modify at least part of the original dialling code so that a resulting combination of original and modified dialling codes is passed to the telephone network,
• wherein said decision means comprises means for causing the muting means to suppress at least part of a digit of the original dialling code from onwards transmission and comprising means for causing the dialling code generating means to generate a modified dialling code as a replacement for the suppressed part of the original dialling code so that the resulting combination of original and modified dialling codes is passed to the telephone network.