Installing Telephones and Adjuncts
Installing the Direct Station Selector
The DSS is an optional piece of telephone equipment. One or two DSSs can
be connected to an MLX-28D or MLX-20L telephone.
NOTE:
Connect the DSS(s) before you install the MLX telephones.
Before installing the DSS, consider the following:
■ Auxiliary power is required under the following circumstances:
— An MLX telephone with an MFM and two DSSs requires a 329A
power unit.
— An MLX telephone (without an MFM) has two DSSs requires a
KS22911-L2 power unit.
— An MLX telephone with one DSS and an MFM requires a
KS22911-L2 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 aKS22911-L2 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 329A power
supply and the MLX telephone can be no more than 50 ft (15 m).
■ Do not replace the 2-foot (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 the Direct Station Selector
3-31