Delay Ring is a communications system ringing option that provides a delay before the telephone rings, when a call is received on a cover button or outside line button. The delay is two rings for an outside line, SA and ICOM buttons.
You should use this procedure if you want calls not answered by the MERLIN Messaging System to ring on the operator’s DLC after two rings.
Refer to the "Group Calling" communications System Planning Form for line and pool numbers. Use communications System Planning Form containing "System Numbering: Extension information", to identify the system operator’s extension.