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Pulse KP

 
History of Telephone Hacking

.... Then the switch would send a combination of MF signals to signify the start of a number (Key Pulse, or KP), then the actual number in dial (consisting of ....

2831 Words 11 Pages

The History of Telephone Systems Hacking

.... Then the switch would send a combination of MF signals to signify the start of a number (Key Pulse, or KP), then the actual number in dial (consisting of ....

2674 Words 11 Pages