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] B-ISDN (Broadband Integrated Services Digital Network) backplane interfaces AIC-I cards environmental alarm connections ONS 15454 Shelf Assembly backups databases 2nd memory bandwidth available CIR circuits concatenation default best-effort high-bandwidth services LANs Layer 2 topologies ONS 15454 service-provider management sharing waste of XC cards BDFB (battery distribution fuse bay) benefits of DWDM of Frame Relay BER (bit error rate) bidirectional line switch ring (BLSR) 2nd 3rd bit error rate (BER) BITS (Building Integrated Timing Supply) 2nd 3rd 4th BLANK/FILLER BLSR (bidirectional line switch ring) 2nd 3rd BML (Business Management Layer) BNC (Bayonet Neill-Concelman) bridges Broadband Integrated Services Digital Network (B-ISDN) Building Integrated Timing Supply [See BITS (Building Integrated Timing Supply).] Business Management Layer (BML) bytes interleaving line overhead path overhead section overhead |