| 摘要 |
PURPOSE:To obtain an economical conversion unit which performs the signal conversion according to the class of plural kinds of plural kinds of multi-frequency signal, by controlling an information exchange unit, which is provided for every sub- group of incoming registers, by the incoming register. CONSTITUTION:In case that a MF relay which indicates a multi-frequency signal class is operated in incoming register IR, when selection number information and originating subscrilber class information are received and stored, originating subscriber class information is set to information conversion unit CONV, and next, common controller MK is acquired through incoming register marker connector IRMC to send these information. MK sends the subscriber class to CONV. When the MF relay is operated, IR sends the incoming subscriber class to the originating station. When the MF relay is not operated, subscriber class information is sent to MK after being sent to information converter circuit MA. The same control of MK is sufficient for both cases. |
