A communication control mechanism installable in the communications controller of an ISDN terminal adapter is operative to conduct in-band communications with its digital terminal device during an internet communication session between the digital terminal device and a digital communication network interface of an internet service provider. These electrode layers have interconnected hollow nanostructures that contain high capacity electrochemically active materials, such as silicon, tin, and germanium. 3 to 5 used in the preparation of a synthetic faujasite zeolite which has high thermal stability and higher crystallite size. When a pumping light source in one of the \u201cn\u201d light sources for Raman amplification had a failure, the spare pumping light source in the \u201cn\u201dth light source for Raman amplification corresponding to the failure occurred pumping light source is worked. With a composite switch having this configuration, an operation stroke is short and the generation of noise can be suppressed. The method includes forming a plurality of shallow trenches, covering a portion of the plurality of shallow trenches, then etching the uncovered shallow trenches to create deeper trenches.