Index[SYMBOL] [A] [B] [C] [D] [E] [F] [G] [H] [I] [J] [K] [L] [M] [N] [O] [P] [Q] [R] [S] [T] [U] [V] [W] [X] [Y] UBIC (Universal Backplane Interface Connector) UDCs (user data channels) 2nd UNI (User-to-Network Interface) ports unidirectional path switched ring [See UPSR (unidirectional path switched ring).] Universal Backplane Interface Connector (UBIC) Universal Time Coordinated (UTC) upgrading software 2nd UPSR (unidirectional path switched ring) 2nd 3rd 4th 5th user data channels (UDCs) 2nd User-to-Network Interface (UNI) ports users, security UTC (Universal Time Coordinated) |