AT&T MERLIN Plus System Manual page 165

ADMINISTRATION
HOW TO USE
None
To set up your SAA:
Unplug the appropriate voice terminal from its modular wall jack, and plug
1
it into the jack labeled V.T. on your SAA.
Plug one end of the modular cord into the jack labeled C.U. on the SAA
2
and the other end into the voice terminal's modular wall jack.
Plug the modular cord from the extra alert device into the jack labeled
3
Alerter on the SAA.
To have the extra alert device turn on when a call rings at the appropriate
voice terminal, turn the SAA to the On position.
If you want to use more than one extra alert device alternately:
Turn the extra alert switch's knob to the appropriate On position labeled
1
(1) or (2). For example, if you connect a bell to position (1) and a strobe
to position (2), turn the control switch to position (1) to operate the bell
and to position (2) to operate the strobe.
If you want to use more than one extra alert device simultaneously:
Turn the extra alert switch knob to the appropriate On position labeled (1)
1
or (2). For example, if you connect a bell and a strobe to a line bridging
adapter and the adapter to position (1) on the SAA, turn the control
switch to this position.
Accessory Equipment 5-101