Scannable Barcode for UPC 681381961946
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| Marketplace | Price | Updated |
|---|---|---|
| $44.08 | 04/08/2022 06:00:12 GMT - Details |
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Attributes
| Attribute | Value |
|---|---|
| Binding | Electronics |
| Brand | Taidacent |
| EAN | 0681381961946 |
| Manufacturer | Taidacent |
| Model | ddsfm |
| MPN | DT210 |
| UPC | 681381961946 |
Description
- Dual tone signal decoding and encoding;Remote control device;Signal generator
- The keystroke or digital information is converted into a two-tone signal during encoding and transmitted, and the existence of the keystroke or digital information is detected in the received DTMF signal during decoding.
- A DTMF signal is made up of audio signals of two frequencies. The frequencies of these two audio signals come from two pre-allocated frequency groups: a row frequency group or a column frequency group. Each pair of such audio signals uniquely represents a number or symbol.
- There are usually 16 keys in the telephone, including 10 numeric keys 0-9 and 6 function keys , A, B, C, D. According to the combination principle, there should be 8 different single audio signals. Therefore, there are also 8 kinds of frequencies that can be used, so it is called multi-frequency, and because it uses any one of the high and low frequencies to arbitrarily select the combination for encoding, it is also called "8 out of 2" encoding technology.
- According to CCITT's recommendations, the internationally adopted multiple frequencies are 697Hz, 770Hz, 852Hz, 941Hz, 1209Hz, 1336Hz, 1477Hz and 1633Hz. With these 8 frequencies, 16 different combinations can be formed, which represent 16 different numbers or function keys.
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