HUT Comms. Lab, Timo O. Korhonen
26
Speech and data communications
nTeletraffic can be forced to fixed rate or bandwidth as speech in PSTN or ATM traffic
n
Speech
Data
Delays
Errors
Limited to ~200 ms
Depends on Data
High tolerance
 Very limited tolerance
Stream
Continuous: Circuit
switching
 Bursty: Packet
switching