ARRANGEMENT FOR THE ESTABLISHMENT OF CIRCULAR AND COLLECTIVE COMMUNICATIONS IN A TELEPHONE CENTER

摘要

Apparatus for establishing multi-address and conference call connections in a switching system comprising line terminators associated with respective incoming and outgoing lines, comprises a connection memory which is common to all line terminators in which there is associated with each line terminator a storage cell which includes, for the duration of a connection, an allocation between a specific calling line terminator and a specific called line terminator. Devices for scanning the line terminators and for addressing the connection memory are included, wherein the line terminators through an evaluation of the address contained in an address storage cell of a connection memory, are interconnected, respectively, only for the purpose of transmitting a message character. In addition to the line terminators for incoming and outgoing lines, additional multi-address terminators are provided. The first multi-address terminator is connected to the inputs of the following multi-address terminators for the purpose of simultaneous transmission of message characters. The address of the first multi-address terminator is entered in the storage cell associated with a calling line terminator and a connection memory and the addresses of the called line terminators participating in the multi-address operation are entered in the storage cells associated with the following multi-address terminators in the connection memory. A connection control logic is provided which is connected by way of control lines and information lines to the line terminators and multi-address terminators, and which is connected with the connection memory by way of read lines into the devices for scanning the line terminators and multi-address terminators via address lines.