... rows. Date, time, extension number, call status, conversation time, information of incoming calls, program status can be displayed.2.Incoming Call ... outside call. 9.TH/TL Key: For adjusting the volume of speaker, handset, earphone and ring. 10.SPKR Key: For hand free ... a conference call. 12.PAGE Key: For paging external loud speaker and key phones. 13.HOLD Key: For confirming program revised ...