Short Data Service(SDS) is the short message service used in Tetra. The SDS service, which is comparable to the Short Message Service( SMS), can be used to transmit messages with a length between 16 bits and 2,047 bits.
The transmitted messages can be addressed to a single mobile device or to multiple mobile devices. User data is transmitted on the organization channel or the traffic channel. Both short text messages as e-mail or pre-formulated templates can be sent.