newtonr-laptop*CLI> sip show channel 4f437f4f-9781f951@192.168.1.245 

  * SIP Call
  Curr. trans. direction:  Incoming
  Call-ID:                4f437f4f-9781f951@192.168.1.245
  Owner channel ID:       SIP/6001-00000000
  Our Codec Capability:   (gsm|ulaw|alaw)
  Non-Codec Capability (DTMF):   1
  Their Codec Capability:   (g723|ulaw|alaw|g726|g729)
  Joint Codec Capability:   (ulaw|alaw)
  Format:                 (ulaw)
  T.38 support            No
  Video support           No
  MaxCallBR:              384 kbps
  Theoretical Address:    192.168.1.245:5060
  Received Address:       192.168.1.245:5060
  SIP Transfer mode:      open
  Force rport:            Auto (No)
  Audio IP:               192.168.1.187 (local)
  Our Tag:                as7c97e782
  Their Tag:              8a1cf73789a0a289o0
  SIP User agent:         Linksys/SPA942-5.2.8
  Peername:               6001
  Original uri:           sip:6001@192.168.1.245:5060
  Caller-ID:              6001
  Need Destroy:           No
  Last Message:           Rx: ACK
  Promiscuous Redir:      No
  Route:                  <sip:6001@192.168.1.245:5060>
  DTMF Mode:              rfc2833
  SIP Options:            replaces replace 
  Session-Timer:          Inactive