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Buffered and Unattended Dial Unit Disclosure Number: IPCOM000052009D
Original Publication Date: 1981-Apr-01
Included in the Prior Art Database: 2005-Feb-11

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Alspaugh, GR O'Hara, FP [+details]


Many service personnel carry portable data recorders (PDRs). These devices are hand-held units used to collect data in a real-time environment. The data is normally transferred over a phone line to a central computer. This might be done using an acoustic coupler or a direct connection to a phone jack. With a large number of users attempting to gain access to a system, the busy rate will be high. The easiest way to avoid this is to increase the number of phone lines. This is expensive, and still the lines can become saturated. Any busy line is a waste of the user's time as well as being irritating. The device disclosed herein minimizes the amount of user time required, busy signals, and the number of telephone lines needed.