*CLI> zap show channels
   Chan Extension  Context         Language   MusicOnHold
 pseudo            from-pstn
      1            from-pstn
      2            from-pstn
      3            from-pstn
      4            from-pstn
*CLI> zap show channel 1
Channel: 1
File Descriptor: 27
Span: 1
Extension:
Dialing: no
Context: from-pstn
Caller ID string: "Channel 1" <6001>
Destroy: 0
InAlarm: 0
Signalling Type: FXS Kewlstart
Owner: <None>
Real: <None>
Callwait: <None>
Threeway: <None>
Confno: -1
Propagated Conference: -1
Real in conference: 0
DSP: no
Relax DTMF: no
Dialing/CallwaitCAS: 0/0
Default law: ulaw
Fax Handled: no
Pulse phone: no
Echo Cancellation: 0 taps unless TDM bridged, currently OFF
Actual Confinfo: Num/0, Mode/0x0000
Actual Confmute: No
Actual Hookstate: Onhook