A double talk detector for controlling the echo path estimation in a telecommunication system by indicating when a received coded speech signal is dominated by a non-echo signal; i. In one embodiment, an assembly for duplicating a master key includes an optical imaging device, a logic, a clamping assembly, and a cutting member. The images are indexed based upon the insurance claim, the provider, the patient, andor the carrier to enable the carrier to access the images associated with a specific insurance claim efficiently.