data link connection identifier. Reference number identifying a VC (virtual circuit) in a Frame Relay network. Similar to a logical channel in a X.25 network.
Found on http://www.encyclo.co.uk/visitor-contributions.php
Data-link connection identifier. Value that specifies a PVC or SVC in a Frame Relay network. In the basic Frame Relay specification, DLCIs are locally significant (connected devices might use different values to specify the same connection). In the LMI extended specification, DLCIs are globally significant (DLCIs specify individual end devices).... Found on https://www.encyclo.co.uk/local/22803