A PCMCIA credit card sized modem for use with a portable computer includes a modular data access arrangement (DAA). The modem includes a substantially rectangular modem frame configured for mounting within the case of the portable computer. The frame has a first end configured to interface with the computer....http://www.google.ca/patents/US5457601?utm_source=gb-gplus-sharePatent US5457601 - Credit card-sized modem with modular DAA
