| 摘要 |
Ordinary telephone sets comprising a signaling key are employed as subscriber stations in a memory-programmed telephone exchange system. Those information which respectively characterize the performance features to be activated are stored. Depending on the existence of specific switching states, the information with respect to the first of the performance features applicable thereto are transmitted to the subscriber station on the basis of the actuation of the signal key and are indicated there in a sensorally perceptible fashion as a statement regarding the respective performance feature. This indication is meaningfully comprised of the announcement of the performance feature. The memory storing the announcements, consequently, is part of a voice output device. Those voice announcements which state the performance features or services which can be activated by the subscriber are communicated to the subscriber. When the subscriber actuates the signal key during an announcement or in a short time interval prescribed subsequent thereto, the assigned performance feature is activated. Insofar as a further key actuation is omitted during this time interval, a next possible performance feature is automatically announced to the subscriber. The end of a prescribed time interval is rendered perceptible by an attention character. |
