International Telemetering Conference Proceedings / October 21, 2002 / Town & Country Hotel and Conference Center, San Diego, California / There are many applications where an ultra-compact PC (palm-top) is required for quick analysis of PCM data. There are many design issues associated with the design of a PC-Card (PCMCIA) decommutator. • Is it possible to connect a 20Mbps PCM stream? • What outputs are required from such a card? • How many cards can be used? • Which mode to use (memory or I/O) • How to program such a card • How to develop third-party software for analysis of data This paper discusses some of these issues and the applications for such a card.