A stabilized azithromycin composition comprising azithromycin monohydrate, and about 5 to about 15 weight percent, based on the total weight of the composition, of water. A pair of upper and lower rotating shaft convex portions are provided at one end of a movable iron piece along the same shaft center. The bottom side of the shoulder is provided with four centering grooves that cooperate with four centering cams provided in the chuck member. In addition, the invention relates to a process for manufacturing a paper product. The radio head interface module receives either air interface protocol configuration information, or RF signal bandwidth allocation information, from the call processing software module for one or more communication channels, the information providing a timing trigger and a protocol or bandwidth for one or more communication channels. In an exemplary embodiment, the remote, self-contained communications antenna unit includes a transportation vehicle that carries a generator for power, backup batteries, transmitter and receiver equipment, a digital signal processor, a network interface unit, an air conditioner, and an extendible mast.