Thomas Kunz
Systems and Computer Engineering
32
GSM Services
–speech
nmost important and widely used service
nuses discontinuous transmission and voice activity
detection
–transmit
at about 40% of time, when user actually speaks
–complete
silence at receiver unnerving - comfort noise
–data
ndifferent services available, depending on end-to-end transmission
type, transmission mode, terminal capability
nsupports data rates of 300 bps up to 9600 bps
–facsimile
–short
message service
nalphanumeric messages of up to 160 characters
nmessages saved on SIM