Patent ID: 7495188

Claim:
A method of switching circuits in an audio signal transmission system, the audio signal transmission system including a plurality of patching devices inserted into a front opening of a chassis, each device including circuitry and first and second spring assemblies, the circuitry including a no normal configuration, a full normal configuration, and a half normal configuration, the method comprising the steps of: a) removing one patching device of the plurality of devices from a first slot location in the chassis, the one patching device having a first circuit configuration, the first circuit configuration being one of the no normal, full normal, and half normal configurations; b) switching the circuitry of the one patching device from the first circuit configuration to a second circuit configuration, the second configuration being a different one of the no normal, full normal, and half normal configurations; and c) inserting the one patching device having the second circuit configuration back into the first slot location in the chassis; d) wherein the circuitry of each of the patching devices is accessible for switching only when the patching device is removed from the front opening of the chassis.