TCL 'infotag get med_envelope_from' doesn't work on IOS 12.3(6) ?

Hallo,

Does anybody know why I cant use: infotag get med_envelope_from on IOS
12.3(6) ? How can I obtain e-mail from address in mmoip dial-peer
application (off-ramp fax).

Thank you in advance,
Hypnos
Telecom, Cabling and VoIP continues...
Tags: Telecom telecom cabling Broadband Cable fiber optic