A medication pump includes a housing including an external wall and a plurality of internal adjoining housings, including a first housing enclosing a cartridge. Ruthenium precursors that may be used include ruthenium containing carbonyls, arenes, cyclopentadienyls, and certain other ruthenium containing compounds. Consequently, the compounds of Formula I and the pharmaceutical compositions thereof are useful for the treatment of diseases, disorders, or conditions mediated by glucagon. An asynchronous transfer mode switch is operable to switch a traffic cell based on header information in the traffic cell.