DS21FF44 и другие
| Компонент | Описание | Производитель | |
| DS21FF42 | 4 X 3 Twelve Channel T1 Framer |
Dallas Semiconductor |
 |
| DS21FF42N | Four x Four 16 Channel T1 Framer |
Dallas Semiconductor |
|
| DS21FF44 | 4x3 Twelve Channel E1 Framer, 4x4 Sixteen Channel E1 Framer |
Dallas Semiconductor |
|
| DS21FF44N | Four x Four 16 Channel E1 Framer |
Dallas Semiconductor |
|