[root@asterisk ~]# asterisk -rx "show channels"
-- Remote UNIX connection
Channel Location State Application(Data)
Zap/4-1 036771437@from-pstn: Ringing AppDial((Outgoing Line))
SIP/212-b7d96730 s@macro-dialout-trun Ring Dial(ZAP/g0/036771437|300|Tt)
Zap/5-1 (None) Up Bridged Call(SIP/210-b7dd7120)
SIP/210-b7dd7120 s@macro-dialout-trun Up Dial(ZAP/g0/9999280|300|Tt)
Zap/2-1 (None) Up Bridged Call(SIP/219-b7de1d70)
SIP/219-b7de1d70 s@macro-dialout-trun Up Dial(ZAP/g0/03|300|Tt)
Zap/3-1 s-spy@custom-chanspy Up ChanSpy(SIP|)
Zap/1-1 (None) Up Bridged Call(SIP/211-b7d99118)
SIP/211-b7d99118 s@macro-dialout-trun Up Dial(ZAP/g0/5385603|300|Tt)
9 active channels
5 active calls
Verbosity is at least 5