Techniques are described that can be used to identify a defective communication channel in a communications network. Note that in relational database terminology, sometimes object stores are simply referred to as schema. The TSI is operable based on predefined switching instructions to access the shared memory to stored traffic channels received from the first bus and to retrieve traffic channels for transmission on the first bus. Associating the faulty registration with an existing registration for a subscriber based on matching the identification information. This method allows each of devices in the home network to share resources and ensure the reliability of the service call. The reservoir includes a translucent member for viewing of liquid levels within the reservoir, and a valved outlet.