Method of making conference call connections in a multiplex switching system

摘要: A method for making connections conference calls in a PCM time division multiplex switching system incorporates the steps of adding, during each pulse frame, code words received from subscribers to call, and storing representative intermediate sums resulting such addition call memory. The word total sum accumulated, preceding frame is read out respective his slot, with optional subtraction subscriber before transmitted him. When have consecutive slots, memory bypassed generation sum.