This only holds if the link is not dynamic. The internal behavior of the link in each case is different.
Event occurs a number of seconds later than equal to the link delay.
Alternately, when the link is dynamic, and receives , then it will schedule to possibly unblock the queue at the appropriate time. However, is scheduled only if is the only packet currently in transit. Otherwise, there is at least one packet in transit on the link that must be delivered before at . When the packet just before in transit on the link is delivered at the neighbor node, the DelayLink object will schedule an event for itself to fire at .