asterisk1*CLI> sip show channels
Peer             User/ANR    Call ID      Seq (Tx/Rx)  Form  Hold     Last Message
192.168.0.100    (None)      056ce923709  00101/04096  unkn  No       Rx: REGISTER
1 active SIP channel


 * SIP Call
  Direction:              Incoming
  Call-ID:                056ce9237093758a44482b8b0ddecded@127.0.0.1
  Our Codec Capability:   1026
  Non-Codec Capability:   1
  Their Codec Capability:   0
  Joint Codec Capability:   0
  Format                  unknown
  Theoretical Address:    192.168.0.100:5060
  Received Address:       64.81.162.90:60171
  NAT Support:            Always
  Audio IP:               71.60.125.243 (local)
  Our Tag:                as493167a7
  Their Tag:              as08b7e2e2
  SIP User agent:         Asterisk PBX
  Need Destroy:           0
  Last Message:           Rx: REGISTER
  Promiscuous Redir:      No
  Route:                  N/A
  DTMF Mode:              rfc2833
  SIP Options:            (none)