A system and method for switching security associations between network devices. Each chamber has a gas inlet and a gas outlet and a sensor. This enables the contact center to accommodate sudden influxes of work items without substantially increasing customer wait time. Furthermore, a plurality of data stored in a memory are appropriately selected, one file having a plurality of pages is formed on the basis of the selected data, and a file having the attribute information and file end information for each page is formed and transmitted. The methods described herein can be performed on bundles of hollow polymer fibers, including bundles of hollow polymer fibers mounted in a module. In one embodiment, an optic cable suitable for down hole oil field applications comprises one or more optical fibers disposed in an inner tube and a corrosion resistant metal outer tube disposed over the inner tube, where the inner and outer tubes make intermittent contact.