20th March 2002 at 13:28
#21346
Jose Quintero
Guest
There are some kind of Carriers.
IP Carriers, for INTERNET, they are using IP over SDH or SONET (POS).
Multiservice Carriers: they use A optical backbone with SDH/SONET/DWDM, and over it they use ATM/IP.
Yor questios is very generale, here a general answer
RDS
JIQ