AT&T MERLIN LEGEND System Reference Manual page 375

Features
Feature Interactions
Auto Answer All
Coverage
Forward and Follow Me
2-326 Ringing Options
The factory setting for Abbreviated Ring is enabled.
Transfer returns ring until answered and do not receive Abbreviated Ring.
While using the programming codes or display selections to program all
lines, the user must press any line button with an outside line or any System
Access or Intercom button. The user receives an error tone, and a display
telephone user sees an error message if the user presses any other type of
button.
When one of the eight Personalized Ringing patterns is selected, the user
can hear the Personalized Ringing pattern selected while in the extension
programming mode. However, the Personalized Ringing pattern selected is
not shown on MLX display telephones or on system programming report.
Delayed Ring is useful for people who provide backup coverage when the
system operator is busy on another call, or for people who provide coverage
for a co-worker's personal line.
No Ring is appropriate for people who do not usually answer outside calls.
To answer a call when a telephone is programmed not to ring, the user
simply presses the line button with the flashing green LED.
The analog multiline telephone user selects the lines to be answered by the
device connected on a GPA by programming each line for Immediate or
Delayed Rings. The lines not to be answered are programmed for No Ring. If the
user wants the device to answer only inside calls, all personal lines must be
programmed for No Ring.
Primary Cover, Secondary Cover, and Group Cover buttons can be
programmed for Immediate Ring, Delayed Ring, or No Ring. If an Individual or
Group Coverage receiver is on a call when a coverage call is received, the
receiver hears an abbreviated ring (if abbreviated ring is enabled). CalIs
received on a Primary Cover, Secondary Cover, or Group Cover button ring with
the receiver's (not the sender's) Personalized Ringing pattern.
On multiline telephones, calls forwarded to an extension ring with an
abbreviated ring at the forwarding telephone and also ring at the destination
telephone. On single-line telephones, calls forwarded to an extension ring at
both the forwarding telephone and the destination telephone. On both multiline
and single-line telephones, calls forwarded to a telephone number do not ring at
the forwarding telephone.
Outside calls received at the forwarding station ring as an internal call at the
destination station (one ring) and do not receive the normal distinctive ring for
an outside call.