In a related art mobile telephone system, the generation of an RBT and a busy tone is realized by transmitting data registered in a network system to a calling telephone. Plural plate-like members are arranged between the first part and the second part, and the air passage is formed by a space enclosed by the first part, the adjacent partition member, and the second part. The elongated housing preferably includes a first segment and a second segment slidably coupled to form a telescopic elongated housing that is configurable into at least two lengths. Subsequent to the establishment by the HRPD network of a traffic channel with the MS, the non-HRPD network releases non-HRPD network RF resources associated with the MS. The first lock of the double-locked data message is then unlocked, at the sender, using a first key, leaving the data message single-locked by the second lock. Each pellet can be coated such as with a smectite that preferably is bentonite.