首页>
外国专利>
Direct-station-selection intercommunication and automatic holding circuit in a key telephone system
Direct-station-selection intercommunication and automatic holding circuit in a key telephone system
展开▼
机译:按键电话系统中的直接选台互通自动保持电路
展开▼
页面导航
摘要
著录项
相似文献
摘要
Apparatus incorporated in an operator attended key telephone system for answering incoming calls to the key telephone system, placing such calls on hold, communicating with other key telephone sets in the system while the incoming call is held, and for transferring the incoming call to another key telephone set.
展开▼