Index[SYMBOL] [A] [B] [C] [D] [E] [F] [G] [H] [I] [K] [L] [M] [N] [O] [P] [Q] [R] [S] [T] [U] [V] [W] [X] [Y] [Z] Q-series protocols Q.921 LAPD frame format 2nd 3rd 4th 5th 6th Control field 2nd Data field FCS field Flag field logical link establishment 2nd Q.922 protocol LAPF control protocol Control field 2nd Information field 2nd 3rd 4th 5th Q.931 messages 2nd 3rd 4th Q.931 message format Call Reference field Information Elements field Message Type field 2nd Protocol Discriminator field Q921 QoS parameters Frame Relay 2nd QPSK quiet periods (snapshot routing) |