The Tsushin Booster for the PC Engine is one such project ... It seems like a rather unlikely product: a modem attachment for a games console with an added 32 KB of battery-backed SRAM.

A modem for use in a laptop or other computer with a PC Card (PCMCIA) slot. Modem PC Cards come in landline and wireless varieties, the latter enabling you to connect to a specific cellular or ...

(1) (Voice Over IP modem) A device that converts Internet-based voice service from the cable or telephone company to the user's telephones. Officially called an analog telephone adapter.