Installing Direct Station Selectors - AT&T MERLIN LEGEND Release 3.1 Installation Manual

Installing Direct Station Selectors

Installing Direct Station Selectors
The Direct Station Selector (DSS) is an optional piece of telephone equipment.
You can connect up to two DSSs to an MLX-28D or MLX-20L telephone that is
programmed as an operator console.
Considerations
Review the following items before you begin the installation procedure.
Connect the DSSs before you assemble the MLX telephones.
Auxiliary power is required under the following circumstances:
— An MLX telephone with an MFM and two DSSs requires a
406743419 power unit.
— An MLX telephone without an MFM, but with two DSSs, requires a
406943837 power unit, 400B adapter, and the D6AP cord that is
provided with the MFM.
— An MLX telephone with one DSS and an MFM requires a
406943837 power unit, 400B adapter, and the D6AP cord that is
provided with the MFM.
— If one carrier has three or more MLX telephones, each with a DSS
attached, use a 406943837 power unit, 400B adapter, and D6AP
cord for each MLX telephone and DSS after the first two.
The total length of cords between the KS22911-L2 or 406743419
power supply and the MLX telephone must not be more than
50 ft. (15 m).
Do not replace the 2-ft. (61-cm) D8AC cord (packaged with the DSS)
with a longer cord. Improper operation may result.
Connect each KS22911-L2 power supply to an AC outlet that is not
controlled by a wall switch.
Installing Telephones and Adjuncts
3–43