vēl druksu konkrētāka spama
The innovation in SMS is indicated by the word Short in Short Message Service. But why should the message length be limited to 160 characters in a situation where a service with an unlimited message length was available (e.g. a service using a Message Handling System)? The GSM system is optimised for telephony, since this was identified as its main application. The key idea for SMS was to use this telephony-optimised system and to transport messages on the signalling paths needed to control the telephony traffic during time periods when no signalling traffic existed. In this way unused resources in the system could be used to transport messages without additional cost. But it was necessary to limit the length of the messages to 128 bytes (later improved to 160 characters), so that the messages could fit into the existing signalling formats. Therefore the service was named “Short Message Service”.