Abstract: A method described in this document enables building a (logical) SDH/SONET ring where the connections between the packet-switched Access Interfaces of the SDH/SONET ring are automatically and dynamically (at 1 ms time-scale) arranged based on the actual volumes of the packet traffic flows between the Access Interfaces of the SDH/SONET ring and fair sharing of network resources. Traffic prioritizing is possible within the Access Interface to Access Interface traffic flows. No packets are lost in the SDH/SONET ring, unless temporarily in case of line or equipment failure.