Abstract: Apparatus including photodetector device, signal output device, and housing configured to be held in human hand. Signal output device is configured for emitting perceived color signal corresponding to light color data detected by photodetector device. Method that includes: providing apparatus configured to be held in human hand and having photodetector device and signal output device; causing photodetector device to detect light color data from light source; and causing signal output device to emit perceived color signal corresponding to detected light color data.

Abstract: An emergency call monitor (110) monitors the progression of a call in a telephone switching system. The sequence of called digits for a call is detected by a line/trunk interface unit (200). A call-type processor (202) determines whether the call is an emergency call by examining the sequence of called digits and examining a call-type associated with the call. If the call is an emergency call, then a call monitor (204) is initiated to monitor the progression of the call through the telephone switch. If errors are encountered during the call, an alarm (206), including a visual and/or audible indicator, is asserted.