AT&T MERLIN LEGEND Installation & Maintenance Manual page 242

Installation
Test the Touch-Tone Receivers
Four touch-tone receivers (TTRs) are system resources available
on each 400, 400 GS/LS, and 800 DID module. The 008 OPT and
012 basic telephone modules also provide two TTRs per module
for system use. Follow these steps to test the TTRs:
1. At a single-line telephone connected to a 012 or 008 OPT
module, pick up the handset. Dial ∗04 and the 2-digit number
(starting with 01) of the TTR to be tested.
You should hear a busy tone if the receiver is in use or a
reorder tone if you misdialed or addressed a receiver not in
your system (for example, you dialed 07 and your system has
only a 012 module and one 400 module for a total of six
TTRs). Try again.
if you hear a dial tone after one to three seconds of silence,
proceed with this test.
Dial the digits 123456789∗0#.
2.
You should hear a dual-tone multifrequency (DTMF) signal as
each button is pressed. After all the digits are dialed, you
should hear a dial tone.
3. Repeat the test for each TTR.
System Acceptance Test
3-134