... .10. Auto-attendant modeThe incoming calls from C.O. lines can be set up the operator mode ... set and direct-access console, the status of C.O. lines and extensions is displayed directly. It is ... a designated extension, private code or the designated C.O. line, the costs or detailed list of calls ... this system and use these terminals as special C.O.line. Shenzhen Taifeng Network Equipment Co., Ltd. is ...