|
''This article is about the British telephone device. See monologue for the other definition.'' A Monolog is a Single Telephone Line Call Logging Device manufactured by British Telecom in the UK. The reason for connecting Monolog to a telephone line is to collect independent call and charging data to help resolve customer queries or complaints. Monolog is usually connected to a customer's line at the telephone exchange although it is possible to monitor the line at the customer's premises. Monolog is based on the Mitsubishi M50734SP-10 8-bit processor that uses an enhanced 6502 instruction set. The unit comprises two boards: a digital board that contains EPROM and RAM for storage of call records and an analogue board that provides the necessary interface components to the monitored telephone line. Monolog is powered via four AA rechargeable batteries which are trickle charged at approximately 2 mA from a control line. This control line is also used for remote connection to the unit for the purposes of data retrieval. == Analogue board == The analogue board provides the interface circuitry between the monitored and control telephone lines and the microprocessor. The board contains the following ICs ; U1 = OP490 - Quad Op-Amp U2 = Mitel MT8870CE - DTMF Decoder U3 = Motorola MC145442 - Single-Chip V.21 300-Baud Modem U4 = LM358N - Dual Low Power Op-Amp U5 = Phillips 74HC157 - Quad 2-input multiplexer The board also contain a 25-way female D-type connector that provides the electrical interface to the monitored/control lines. Alternatively, it provides an RS-232 interface thereby enabling the direct connection of a PC running the ''Dialog'' software. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Monolog」の詳細全文を読む スポンサード リンク
|