| 摘要 |
PURPOSE:To attain a sender transmission system which can increase the number of senders only with less hardware increase, by connecting and controlling required signals with a switch among a multiple frequency signal power supply. CONSTITUTION:Numeric information, timing information and circuit selection information transmitted from a central controller 8 are stored in a tentative storage circuit 6. Those sets of information are analyzed at a microprocessor 15 according to the procedure of a program storage element 14, a required signal out of multiple signal power supply is selected and a designated mixing amplifier among mixing amplifiers 20-20' is selected. Thus, a microprocessor 21 controls a switch 16 for connection while taking inter-digit timing. The obtained multiple frequency signal is kept to a suitable level with the amplifiers 20-20' and transmitted to a remote station via a sender link 7 and outgoing trunks 9-9'. |
