Specifications

3.2.3 Converting Button Designations
When you first power a new DSU II system with no telephones connected, it defaults its station
ports as Impact 24-line speakerphones.
When you connect a telephone to a powered-up system or when you turn on the AC power to a
system after you have connected a telephone to it, the system automatically button maps the
telephone according to the type of software the system has. To change the button mapping
default, install different software and master clear the system.
The buttons on Impact telephones are designated as L buttons; the buttons on DigiTech and
Impression telephones are designated as A and B buttons. Table 3–1 lists each A and B button
and its equivalent on an Impact telephone. The programming steps in this manual use A and B
button designations; if you are programming from an Impact telephone, you must use the proper
telephone programming overlay with the A and B designations. Telephone overlays are included
with the literature package for the digital telephone system. You can also find sample overlays at
the end of Chapter 4, Records.
Table 3–1: Impression, DigiTech And Impact Programming Buttons
Impression DigiTech Impact
A1 A1 L01
A2 A2 L02
A3 A3 L03
A4 A4 L04
A5 A5 L05
A6 A6 L06
A7 A7 L07
A8 A8 L08
A9 A9 L09
A10 A10 L10
A11 A11 L11
A12 A12 L12
A13 A13 L13
A14 A14 L14
A15 B9 L15
A16 B10 L16
B1 B1 L17
B2 B2 L18
B3 B3 L19
B4 B4 L20
B5 B5 L21
B6 B6 L22
B7 L23
B8 L24
When you perform class of service programming from stations 10 or 12 and you have placed an
Impact telephone at the programming port, you should place the programming overlay on it.
DSU II Digital Telephone System IMI66–132
Programming The DSU II System 3 – 9