AT&T MERLIN LEGEND Release 2.0 Equipment And Operations Manual page 59

Introduction
A 4-pair modular cord (D8W)
The monitor can be either monochrome or color.
In addition, the following equipment is useful:
A parallel printer (the PC needs a parallel port for the connection)
A 1200-or 2400-bps modem
NOTE:
SPM uses Interrupt 4 and l/O address 3F8 for COM1. It uses Interrupt 3
and I/O address 2F8 for COM2.
When you use a PC with SPM to program the system, the maximum number of
MLX-20L telephones that can be connected to the system is reduced by one.
Telephone Programming
There are two kinds of telephone programming: Centralized Telephone
Programming and Extension Programming.
Centralized Telephone Programming
Centralized Telephone Programming is an option you can choose from the
System Programming menu to program any feature onto a telephone. Although
many features can also be programmed by individual telephone users Or
system operators, the following features can be programmed only by
centralized telephone programming (and not by individual users):
Barge-In
Headset Hang Up
ICOM buttons—all types (Key and Behind Switch only)
System Access buttons—all types (Hybrid/PBX only)
Extension Programming
Extension Programming allows telephone users and system operators to tailor
their telephones to meet personal needs. Multiline telephone users can assign
a wide range of features to buttons on the telephone. In addition, many other
features can be programmed on both multiline telephones and single-line
telephones that do not require button assignment, such as Call Waiting.
Users can program theier telephones by dialing programming codes or, on MLX
display telephones, selecting features from the display. When a telephone is in
the program mode, the system considers it busy; therefore, no incoming calls
ring at the telephone until it is back in the call-handling mode.
Programming 1-31