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 {HEAD ~ its standby law} {TAIL ~ Li} in progress and from the preceding standby law Li 1 
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 { HEAD ~ its standby law } { TAIL ~ Li } in progress and from the preceding standby law Li 1
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