HUT Comms.
Lab, Timo O. Korhonen
20
Practical network
stratums
nOSI is seldom
realized as
itself but several layers are
melted together into stratumsnIn this example X.25 packet
network operates on ATM
based SDH access stratums.nATM forms an efficient
info pipe where no
address checking or
error correction is done
but it is left for
lower layers
itself but several layers are
melted together into stratumsnIn this example X.25 packet
network operates on ATM
based SDH access stratums.nATM forms an efficient
info pipe where no
address checking or
error correction is done
but it is left for
lower layers
