asterisk*CLI> show channels
Channel              Location             State   Application(Data)             
Zap/2-1              (None)               Up      Bridged Call(IAX2/310-1)      
IAX2/310-1           s@macro-dialout-trun Up      Dial(ZAP/g0/ww4779731|300|)   
Zap/3-1              (None)               Up      Bridged Call(SIP/215-088c6c88)
SIP/215-088c6c88     s@macro-dialout-trun Up      Dial(ZAP/g0/ww4792738|300|)   
4 active channels