Distinctive Ringing Patterns - AT&T MERLIN LEGEND System Reference Manual

Features
Distinctive Ring
2-324 Ringing Options
Distinctive Ring allows a user to determine the origin of a call by listening to the
ringing pattern. A pattern of one ring indicates an inside call, a two-ring pattern
indicates an outside call, and a three-ring pattern indicates a returning
transferred call. A priority call is indicated by four rings on an MLX telephone
and by three rings on analog multiline and single-line telephones.
Note. A queued call console (QCC) system operator receives the inside call and
outside call Distinctive Ring but does not receive the returning transferred call or
priority ring.
When a call is transferred, the user hears one-ring pattern if the person
transferring the call has not completed the transfer. If the person transferring the
call completes the transfer before the user answers the call, the caller hears one
ring to indicate the transfer of an inside call and then three rings to indicate a
transfer of an outside call.
The exact timing of the distinctive ringing cycle for each type of telephone is
shown in Table 2-14.
Table 2-14

Distinctive Ringing Patterns