:: Advantages:
         � nationwide coverage;
         � high redundancy thanks to the SDH switching (OSI level 1) on an alternate route in            minimum time (< 50 ms), which makes it transparent to higher level protocols;
         � low latency (<40ms);
         � BER=Bit Error Rate lower than 1xe-12;
         � highly standardized ATM/MPLS technology;
         � 64Kbps to 622Mbps scalable;
         � available interfaces: ethernet 10BaseT and 100Base T full-duplex