Send Call Request Feature
From Zenitel Wiki
Send a Call Cequest. Call Request is a SEND_MAIL with one of the Predefined AlphaCom mails number 17 or 18.
Param1 : Mail priority; for meaning see SEND_MAIL#Mail_priority. If priororty >= 120 the predefined alarm message 17 is used, othewise the normal predefined call request message 18 is used.