AT&T MERLIN LEGEND Release 3.1 Installation Manual page 224

Installing the Control Unit's Housing
If you hear dial tone after one to three seconds of silence, proceed with this
test.
4 Dial
You should hear a dual-tone multifrequency (DTMF) signal as each button is
pressed. When you finish dialing, you should hear a 3-beep confirmation tone.
5 Repeat the test for each TTR.
Installing the Control Unit's
Housing
After you complete system acceptance testing and if you are confident that
the system is completely installed, you can install the control unit's housing.
NOTE:
Beginning with Release 2.1 or later, the control unit covers are identical to
those on the MERLIN II Communications System. If you need to install control
unit covers on a system prior to Release 2.1, see Chapter 9, "Upgrading the
System."
Installing the Top Cover
To install the top cover, see Figure 7–2 and follow these steps:
1 Be sure the cords have been pressed through the wire managers at the
base of the modules.
2 Hold the top cover with the hooks facing you.
3 Engage the tabs at the rear of the top cover with the carrier.
4 Lower the top cover so the legs lock into the vents on the module.
7–20
Initializing and Testing the System