Cortelco 2750 - Manual (Page 11)

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1.3 Installation
1.3.1 Overview
The 2750 is part of the 7 Series Multiline phone system. Up to 16 instruments may be connected in
this system. All these devices use conventional telephone wiring. Wiring runs between stations may be
a maximum of 600 feet.
1.3.2 Before Installation
In order to install your telephones correctly, you must determine the incoming wiring configuration. In
most cases, incoming lines will be terminated in either RJ11 Single Line Jacks or RJ14 Double Line
Jacks. If you are not sure of your incoming line configuration, contact your telephone line installer.
All connection between the wall jacks and the telephones may be done with standard telephone
modular cords. Please be sure that your modular cords have at least 4 wires in them.
If you have RJ11 jacks, you will need two line adapters (not included) to connect to the 2750. These
couplers take the single line wiring and convert it to double line wiring. These couplers should be
available where you purchased your 2750.
1.3.3 Installation Configurations
1.3.3.1 Standard Configuration
The 2750 is initially configured so that each line is common at all stations. In other words, Line 1 at
each telephone is connected to the same incoming line; Line 2 at each station is connected to the same
incoming line, etc. This is commonly known as a “square system.” If this is suitable for your
installation, you only need to connect the telephones to the telephone lines.
1.3.3.2 Private Line
A private line is connected to only one telephone in the system. No other phones in the system have
access to this telephone line.
1.3.3.3 Unconnected Lines
It is also permissible to leave one or more lines unconnected.
1.3.3.4 Line 1
Line 1 MUST be connected to the same incoming line on all phones for the system to function
correctly.