Circuit arrangement for transmitting digital signals between transmitting and/or receiving devices operating with different data transmission procedures and different data formats

摘要

A circuit arrangement is provided for the transmission of digital signals between transmitting and/or receiving stations which operate with differing data transmission procedures and with different data formats. The signal transmission respectively occurs by way of a converter unit which, like the transmitting and receiving installations, is connected to a switching system. In the train of the transmission of digital signals from a transmitting installation operating with a lower data transmission rate to a receiving installation operating with a higher data transmission rate, the digital signals emitted by the appertaining transmitting installation are first collected in the converter unit in order to be emitted to the appertaining receiving installation only given the existence of a sufficient plurality of such signals. The transmission of digital signals from a transmitting installation operating with a higher data transmission rate to a receiving installation operating with a lower transmission rate occurs in data blocks. A respective plurality of data signals forming a block or, respectively, a signal group, is emitted together with a signal group end mark by the appertaining transmitting installation to the converter unit which then relays the digital signals to the appertaining receiving installation. In order to minimize control expense, the converter unit checks its signal acceptance capability upon the occurrence of the group end mark. Only given existence of a sufficient signal acceptance capability in the converter unit is an acknowledgment character emitted to the transmitting installation, the acknowledgment character then causing the transmission of signals forming a further signal group or block. The invention is preferably employed for signal transmission between telex stations and office printergram or teletex stations.