M-985-01P is Precise Call Progress and Special Information Tone Generator manufactured by Clare.
| Part Number | Description |
|---|---|
| M-985-01 | Precise Call Progress and Special Information Tone Generator |
| M-985-01S | Precise Call Progress and Special Information Tone Generator |
| M-985-01T | Precise Call Progress and Special Information Tone Generator |
| M-980-02 | 3V/5V General Purpose Call Progress Tone Detector |
| M-980-02P | 3V/5V General Purpose Call Progress Tone Detector |
The M-985-01 is an integrated circuit precise tone detector for call progress and special information tones (SIT), as defined by CCITT. The use of integrated circuit techniques allows the M-985-01 to pack the eight filters for call progress detection into a single 22-pin DIP or a 20-pin SOIC. A 3.58 MHz crystal-controlled time base guarantees accuracy and repeatability.
