HUT Comms.
Lab, Timo O. Korhonen
32
The PSTN (cont.)
nVulnerable: network paralyzed easily in exchange
malfunctions
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 of order of several Mbytes by using various extension
techniques
nModern day networks are constructed thus that the required
services can be supported: Thus
Services
shape the modern networks!