Media and codec offerings to be set on an outbound SIP channel prior to dialing.
When read, returns the codecs offered based upon the media choice.
When written, sets the codecs to offer when an outbound dial attempt is made, or when a session refresh is sent using PJSIP_SEND_SESSION_REFRESH.
media- types of media offered
This documentation was imported from Asterisk Version GIT-17-7300bdd