· Abandon. Aborts the current dialogue by resynchronizing to a newsynchronization point with a serial number greater than all previous ones.82 Communication Networks Copyright © 2005 PragSoft· Restart. Re-attempts a dialogue by retreating to an earlier synchronization point,provided it is no earlier than the last confirmed major synchronization point.· Reset. Aborts the current dialogue and sets the synchronization serial number toa new value subject to negotiation.