- Apple 300/1200 modem
- Apple Duo Dock modem adapter Card 10 pin unknown connector
- Apple ImageWriter Serial
- Apple LaserWriter AppleTalk
- Apple LaserWriter Serial
- Apple serial NB card
- GSM Modem Maestro 20/100 Fargo Telecom Wismo Maestro 20 Maestro 100 GSM GPRS modem 900 / 1800
- RocketPort Serialport Available at RocketPort serialport expansion cards.
- Serial Speedster Seems to be available at a 14.4kbps modem called Speedster.
