CMA (Clock Module ADPCM) for DECT connection (Direct Base Station Connections) For OpenScape Business X3/X5 and HiPath 33xx/35xx. The CMA module includes all the functions of the CMS (Clock Module Small). The CMA is required for OpenScape Business X3/X5 and HiPath 33xx/35xx systems with Cordless with direct base station connections to special UP0/E ports, if more than 2 base stations are connected or one base station is connected with more than two b-channels.