Alert-info is suppported or not in trixbox?

hi all,

I am new in trixbox.
If I pass Alert-info to trixbox, then is it possible to get the value of Alert-info
If i pass in the following way :
SIPADDHeader(Alert-info: ${EXTEN});

will it support in the trixbox? if it is possible then then is there any configuration in trixbox? Please let me know.
IS there anyone who can solve? Please help me.

Thanks in advance.

bina