{HEAD ~ A calling station} breaks the silence of the network by transmitting a call sequence . . . ST, ST, ST, ST, ST, . . . , under frequency conditions which are determined from its standby law Li in progress and from {TAIL ~ the preceding standby law} Li 1 
{ HEAD ~ A calling station } breaks the silence of the network by transmitting a call sequence . . . ST , ST , ST , ST , ST , . . . , under frequency conditions which are determined from its standby law Li in progress and from { TAIL ~ the preceding standby law } Li 1
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH