HT9020B и другие
| Компонент | Описание | Производитель | |
| DVT90-200 | Miniature Digitally Tuned Filters |
BOWEI Integrated Circuits CO.,LTD. |
 |
| HT9020 | Call Progress Tone Decoder & ABR Controller |
Holtek Semiconductor Inc |
|
| HT9020A | Call Progress Tone Decoder & ABR Controller |
Holtek Semiconductor Inc |
|
| HT9020B | Call Progress Tone Detector |
Holtek Semiconductor Inc |
|
| HT9020B | Call Progress Tone Decoder & ABR Controller |
Holtek Semiconductor Inc |
|