在电信子系统顺序被包括在电信系统中作为本地消息传输环 - 特别是集成在一个ISDN系统特定的DECT RLL / WLL子系统 - 在引起系统消息的本地消息传输环从电信信道改变发送 - 例如 在DECT标准中定义的Cf信道 - 到电信信道 - 例如 通过两个指令，一个设计为切换命令的第一命令和设计为转换响应第二命令在DECT标准C的信道来控制定义，提供了一种计时器，根据该在不存在切换响应于所述切换命令的发送一另外的开关，在命令 ，

To a telecommunications subsystem, which is integrated in a telecommunications system as a local message transmission loop - especially one involved in an ISDN system DECT-specific RLL / WLL subsystem - the caused by the transmission of system messages in the local message transmission loop switching from one telecommunications channel - eg the defined in the DECT standard C _f channel - to a telecommunications channel - as defined in the DECT standard C _s - channel by two commands to control a designed as a transition command first command and a designed as a changeover response second command, a timing provided, according to the transferred another transition command in the absence of the changeover response to the transition command.