35a36
> ${EXTEN:x}	Current extension, first x digits stripped
45d45
< ${DNID}         Dialed Number Identifier
47c47
< ${HANGUPCAUSE}	Hangup cause on last PRI hangup
---
> ${DNID}         Dialed Number Identifier
50c50,62
< ${SIPDOMAIN}    SIP destination domain of an inbound call (if appropriate)
---
> ${HANGUPCAUSE}	ZAP:  Hangup cause on last PRI hangup
> 
> ${SIPDOMAIN}    SIP:  destination domain of an inbound call (if appropriate)
> ${SIP_CODEC}    SIP:  Sets the RTP codec for a call
> 
> Application specific variables
> 
> ${AVAILCHAN}	The first available channel (output from ChanIsAvail )
> ${ENUM}	 	The output of the ENUM application
> ${MEETME_AGI_BACKGROUND}	 Used by the MeetMe application
> ${VXML_URL}	SIP: Send XML Url to Cisco 7960 in Asterisk cmd Dial
> ${ALERT_INFO}	SIP: Set ring cadence for Cisco phones in Asterisk cmd Dial 
>