- CH2100
- Cermetek Microelectronics, Inc.
- MODEM, 2.4kbps, 5V
- CH2100ET
- Cermetek Microelectronics, Inc.
- MODEM, 2.4kbps, 5V
- CH2100SM
- Cermetek Microelectronics, Inc.
- Super small 2400bps modem
- CH2100SM-ET
- Cermetek Microelectronics, Inc.
- Super small 2400bps modem