Abstract: A method of initiating a telecommunication connection between a wireless 911 caller, an emergency 911 dispatcher, and at least one emergency personnel, including identifying a geographical location of a wireless 911 caller; identifying at least one emergency personnel located proximal to the geographical location of the wireless 911 caller; and initiating a telecommunication connection between each of the wireless 911 caller, an emergency 911 dispatcher, and the at least one emergency personnel.

Abstract: A waveform instability circuit provides a voltage/time window for monitoring a known unipolar waveshape or pulse. The voltage/time window is adjustable in dimension and in location along the wavefront. This allows a particularly significant portion of the pulse to be continuously monitored for accuracy or for various segments of the pulse to be selectively monitored merely by repositioning the window. Three voltage comparators are used to determine the reference voltage and voltage window limits. Monostable multivibrators responsive to the reference voltage control the time window limits and logic gates provide the determination of coincidence or anticoincidence of the input waveform section being considered with the window limits.