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A telephone dialer system consists of a programming unit, and a portable telephone dialer unit for producing a selected sequence of dual tone modulated frequency dialing tones, adapted to be programmed by the programming unit when said portable telephone dialer is releasably electrically coupled to

A telephone dialer system consists of a programming unit, and a portable telephone dialer unit for producing a selected sequence of dual tone modulated frequency dialing tones, adapted to be programmed by the programming unit when said portable telephone dialer is releasably electrically coupled to said programming unit. The portable telephone dialer has a case, a reprogrammable memory, a programming interface, a speaker, a battery, a dual tone modulated frequency signal generating integrated circuit chip, and a single bi-state switch operable from the exterior of the case.

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A portable telephone dialer for producing a sequence of dual tone modulated frequencies corresponding to a telephone number during a dialing mode adapted to be preprogrammed with a telephone number by a programming unit having a plurality of programming probes during a programming mode, comprising:

A portable telephone dialer for producing a sequence of dual tone modulated frequencies corresponding to a telephone number during a dialing mode adapted to be preprogrammed with a telephone number by a programming unit having a plurality of programming probes during a programming mode, comprising: a case having at least one surface for substantially enclosing a small volume; a dual tone modulated frequency generating integrated circuit, disposed within said case having last number redial capability and at least one redial input contact for actuating said last number redial capability, said dual tone modulated frequency generating integrated circuit including a reprogrammable memory of the type capable of storing a sequence of digits, and a signal generator for producing a sequence of dual tone modulated frequency signals corresponding to said sequence of digits stored in said memory; a programming interface means, electrically coupled to said reprogrammable memory, for releasably electrically coupling said reprogrammable memory with said plurality of programming probes of said programming unit during said programming mode; an audiofrequency output means coupled to said signal generator for producing a sequence of audible audiofrequency signals corresponding to said sequence of dual tone modulated frequency signals produced by said signal generator during said dialing mode; at least one battery disposed within said case and electrically coupled to said reprogrammable memory means, said signal generator, and said audiofrequency output means, for providing power to said memory means, said signal generator, and said audiofrequency output means; and a single bi-state, switch electrically coupled to said at least one redial input contact and operable from the exterior of said case for activating said last number redial capability and causing said signal generator to produce said sequence of dual tone modulated frequency signals corresponding to said digits stored in said preprogrammed memory wherein, subsequent to programming, said portable telephone dialer is operable exclusively through said last number redial capability, restricting said portable telephone dialer to dialing said sequence of digits stored in said reprogrammable memory.