* SIP Call
  Curr. trans. direction:  Incoming
  Call-ID:                8d03f66ef05e08f9@192.168.1.105
  Owner channel ID:       SIP/215-00000000
  Our Codec Capability:   0xc (ulaw|alaw)
  Non-Codec Capability (DTMF):   1
  Their Codec Capability:   0x1d0f (g723|gsm|ulaw|alaw|g726|g729|ilbc|g722)
  Joint Codec Capability:   0xc (ulaw|alaw)
  Format:                 0x8 (alaw)
  T.38 support            No
  Video support           No
  MaxCallBR:              384 kbps
  Theoretical Address:    192.168.1.105:5060
  Received Address:       192.168.1.105:5060
  SIP Transfer mode:      open
  Force rport:            No
  Audio IP:               192.168.1.6 (local)
  Our Tag:                as09d76272
  Their Tag:              3edaefc4e1e1855b
  SIP User agent:         Grandstream GXP2020 1.2.5.3
  Username:               215
  Peername:               215
  Original uri:           sip:215@192.168.1.105:5060
  Caller-ID:              215
  Need Destroy:           No
  Last Message:           Rx: BYE
  Promiscuous Redir:      No
  Route:                  sip:215@192.168.1.105:5060;transport=udp;user=phone
  DTMF Mode:              rfc2833
  SIP Options:            path replaces replace timer 
  Session-Timer:          Inactive