AT&T MERLIN LEGEND Reference page 135

Customer Support Information
Automatic Dialers.
AND/OR MAKING TEST CALLS TO EMERGENCY NUMBERS:
— Remain on the line and briefly explain to the dispatcher the reason for
the call.
— Perform such activities in off-peak hours, such as early morning or late
evening.
Direct Inward Dialing (DID).
signals to the Public Switched Telephone Network when:
— Answered by the called station
— Answered by the attendant
— Routed to a recorded announcement that can be administered by the
customer premises equipment user
— Routed to a dial prompt
This equipment returns answer supervision on all DID calls forwarded
back to the Public Switched Telephone Network. Permissible exceptions
are when:
— A call is unanswered
— A busy tone is received
— A reorder tone is received
Allowing this equipment to be operated in such a manner as not to
provide proper answer supervision signaling is in violation of Part 68
rules.
B - 4
WHEN PROGRAMMING EMERGENCY NUMBERS
This equipment returns answer supervision