Description
M-8880 functions consist of a high-performance DTMF receiver with an internal gain setting amplifier and a DTMF generator that contains a tone burst counter for generating precise tone bursts and pauses.
Features
- adjustable guard time, automatic tone burst mode, call progress mode, and a fully compatible 6500/6800 microprocessor interface. The receiver portion is based on the industry standard M-8870 DTMF Receiver, while the transmitter uses a switched-capacitor digital-to-analog converter for low-distortion, highly accurate DTMF signaling. Tone bursts can be transmitted with precise timing by making use of the automatic tone burst mode. To analyze call progress tones, a call progress filter can be selec.
M-8880_ClareInc..pdf
