Abstract: Dual tone multifrequency (DTMF) signals are automatically generated by a telecommunications device after a telephone number is called. The signals generated to call the telephone number are determined by a manually operated switch indicating pulse code signal generation or dual tone multifrequency signal generation. It is determined that the telephone number has been dialed by detecting a ring-back signal, voice frequency signals, DTMF signals, or data stream signals. Alternatively, if a predetermined period of time, such as ten seconds, passes without the user pressing a number on the keypad, it may be assumed that the telephone number has been dialed. Upon detecting one of these signals or the passage of time, the telecommunications device is controlled to generate only dual tone multifrequency signals for communication with automated services, such as voicemail, telephone banking, reservation systems, etc.

Abstract: A variable temperature sensor for detecting and/or controlling the temperature of an object is disclosed. The variable temperature sensor comprises a thermallly conductive probe having one end adapted to contact the object the temperature of which is to be sensed, measured and/or controlled and its other end adapted to contact a heat sink so as to create a predetermined temperature profile between the two ends of the thermally conductive probe, and a temperature sensing device having a predetermined temperature sensing point or range contacting the thermally conductive probe at a point which is substantially at the temperature sensing point or within the temperature sensing range of the sensing device.