${SIPCALLID} * SIP Call-ID: header verbatim (for logging or CDR matching) ${SIPDOMAIN} * SIP destination domain of an inbound call (if appropriate) ${SIPFROMDOMAIN} Set SIP domain on outbound calls ${SIPUSERAGENT} * SIP user agent (deprecated) ${SIPURI} * SIP uri ${SIP_MAX_FORWARDS} Set the value of the Max-Forwards header for outbound call ${SIP_CODEC} Set the SIP codec for an inbound call ${SIP_CODEC_INBOUND} Set the SIP codec for an inbound call ${SIP_CODEC_OUTBOUND} Set the SIP codec for an outbound call ${SIP_URI_OPTIONS} * additional options to add to the URI for an outgoing call ${RTPAUDIOQOS} RTCP QoS report for the audio of this call ${RTPVIDEOQOS} RTCP QoS report for the video of this call