Instruction manual

The 4400-Series Telephone Family
3-8
Installation, SPM, Maintenance, and Troubleshooting Supplement
DSS 4450 3
One or two Direct Station Selector (DSS) 4450s can be connected to a
4424LD+ or 4424D+ telephone to enhance the call-handling capabilities of a
system operator with a Direct-Line Console (DLC) or a Queued Call Console
(QCC). When connected to a 4424LD+ telephone used as a system
programming console, the DSS 4450 facilitates system programming and
centralized telephone programming procedures.
Most of the instructions for the use of the DSS 4450 by a system operator
appear in the Direct-Line Console Operator’s Guide and the Queued Call
Console Operator’s Guide. Instructions for use of the DSS 4450 during system
programming or centralized telephone programming appear in System
Programming.
The DSS 4450 is nearly identical in function and appearance to the DSS that
works with MLX telephones. Like the MLX version, the DSS 4450 has:
■ 50 line buttons with one red LED by each button.
■ 3 page buttons (with green LEDS) with 50 extensions each, for a total of
150 extensions that can be assigned.
■ 6 buttons with green LEDs reserved for future use.