Eurosignal

Eurosignal is a European paging service standardized by CEPT for one-way analog transmission of tone-only signals(call class 0) to mobile receivers (Eurosignal receivers).

Four channels are assigned internationally to the Eurosignal service: Channel A on 87.340 MHz, Channel B on 87.365 MHz, Channel C on 87.390 MHz and Channel D on 87.415 MHz. In Germany, channels A and B are used for transmission; modulation is almost exclusively in amplitude modulation, in exceptional cases also in frequency modulation. Since the transmitting subscriber does not receive any acknowledgement in paging services, particularly high demands are placed on the transmission procedures. In addition, a large code capacity is required for several hundred thousand call numbers.

The coding used at Eurosignal is defined in CEPT Recommendation T/R6 and is based on the principle of selective calling systems. Here, the code signal to be transmitted consists of several frequencies sent in chronological order. Since Eurosignal transmits neither text nor speech, but only a tone sequence of four tones, the subscriber must determine his or her own meaning of the call signal on the basis of the tone sequence. In addition to individual calls, there is also the option of group calls, where the same call number is assigned to a group of subscribers.

Call activation takes place from connections of the telephone network, ISDN and mobile telephone networks, C-network and D-network. In Germany, DeTeMobil provides nationwide coverage in three paging areas. Other countries: Switzerland, France, Belgium and the Netherlands.