HUT Comms. Lab, Timo O. Korhonen
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The PSTN (cont.)
nVulnerable: network paralyzed easily in exchange malfunctions (still parallel system(s) provided)
nNetwork intelligence in exchanges and dummy terminals
nPoor adaptivity
nHowever, an important backbone for other networks!
nThe PSTN will be there for a long time and it seems that it can be used for modern day networking also on quite high data rates by using various extension techniques
nModern day networks are constructed thus that the required services can be supported: Thus
n
n
Services shape the modern networks!