This document discusses the parameters and configuration of base station subsystems (BSS) in GSM networks. It describes the channel configuration including logical and physical channels, signaling channels, traffic channels, and their organization into frames, multiframes, and hyperframes. It also provides an example calculation of SDCCH capacity for a cell with 325 subscribers, showing that 5 SDCCHs are needed to support call establishment and location update with a 1% blocking probability based on Erlang B, requiring a separate rather than combined channel configuration.