{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 {TAIL ~ progress} and from 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 { TAIL ~ progress } and from 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 TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH