A method for allocating and configuring TCM in an embodiment of the present invention includes: configuring the domain that needs TCM in a network and the scope of the domain; determining the ODU service that needs TCM; and allocating TCM automatically according to the ODU service trail and the configured domain; and enabling or disabling the TCM of each level. The telephony system and method utilizes a call management server and a voice interpreter server. Fitting portions 19, 20 and 21, 22 are formed on the mirror 12 for receiving portions of the upper cabinet 13 and lighting equipment 14. Conductive layers may take the form of conductive patterns etched into copper laminates on nonconductive layers composed of epoxy printed circuit board material. Node of the links adopt the transmission mode of \u201cmultiple sending and selective receiving\u201d.