Cortelco FOUR LINE CORDLESS ANALOG ADAPTER 2742 Setup guide

OWNER’S INSTRUCTION
MANUAL
Four Line Cordless Analog Adapter
MODEL 2742

Table of Contents
2742 FEATURE LIST................................................................................................................ 1
IMPORTANT SAFETY INSTRUCTIONS ................................................................................ 2
1. UNPACKING AND INSTALLATION................................................................................... 3
1.1. Box Contents ...................................................................................................................... 3
1.2. Telephone Part Identification............................................................................................... 4
2. INSTALLATION ................................................................................................................... 5
2.1. Overview........................................................................................................................ 5
2.2. Before Installation .......................................................................................................... 5
2.3. Initial Configuration ....................................................................................................... 5
2.3.1. Standard Configuration .......................................................................................... 5
2.3.2. Private Lines .......................................................................................................... 5
2.3.3. Unconnected Lines................................................................................................. 5
2.3.4. Line 1..................................................................................................................... 5
2.4. Desk Mount.................................................................................................................... 5
2.5. Wall Mount..................................................................................................................... 6
2.6. Verify Proper Installation................................................................................................ 6
3. CONFIGURATION MODIFICATION .................................................................................. 7
3.1. Change Default Setting................................................................................................... 7
3.2. Station Name Assignment............................................................................................... 8
4. TELEPHONE OPERATION.................................................................................................. 9
4.1. Making and Answering Intercom Calls ........................................................................... 9
4.2. Making and Answering CO Line Calls............................................................................ 9
4.3. Hold ............................................................................................................................... 9
4.3.1. Hard Hold.............................................................................................................. 9
4.3.2. Placing a Call on System Hold ............................................................................... 9
4.4. Transfer .......................................................................................................................... 9
4.4.1. Attended Transfer................................................................................................... 9
4.4.2. Blind Transfer........................................................................................................ 9
4.5. Conference ....................................................................................................................10
4.6. Three Way Calling ........................................................................................................10
4.7. Caller ID........................................................................................................................10
4.7.1. Incoming call........................................................................................................10
4.7.2. Call Waiting Caller ID ..........................................................................................10
4.8. Intercom Calls ...............................................................................................................10
4.8.1. Intercom while Idle ...............................................................................................11
4.8.2. Intercom while on an Outside Call ........................................................................11
4.9. Paging ...........................................................................................................................11
4.9.1. Single Page ..........................................................................................................11
4.9.2. All Page ...............................................................................................................11
5. USING STANDARD TELEPHONES...................................................................................11
5.1. Line Status.....................................................................................................................11
5.2. Calls on Hold.................................................................................................................11
5.3. Call Privacy...................................................................................................................11
5.4. Intercom ........................................................................................................................11

5.5. Fax Machines and Modems ...........................................................................................12
APPENDIX A - Installation Worksheet .....................................................................................13
APPENDIX B - Trouble Shooting Guide ..................................................................................14
APPENDIX C - DTMF Operating Codes..................................................................................15
FCC INFORMATION...............................................................................................................16
TELEPHONE REPAIR.............................................................................................................17
LIMITED WARRANTY...........................................................................................................18

1
THANK YOU
FOR PURCHASING THE
2742
Four Line Cordless Analog Adapter
We want you to know all about your new Cordless Telephone Adapter.
To get the most from your Cordless Adapter, please take time to read this guide thoroughly.
We have included information in your Owner’s Instruction Manual on how to install it, the features it
provides, and the services you can expect from its use.
The 2742 is one of Cortelco’s 7 Series 4-Line Telephone Units. It is part of a Four-Line system
consisting of up to 16 stations of 2740's, 2742's, or 2750's. The 2742 Cordless Analog Adapter will
allow a cordless telephone or other analog device such as a fax machine or modem to be attached to
your 4-Line system
Information on the other products in Cortelco’s 7 Series can be found on our website at
www.cortelco.com.
2742 FEATURE LIST
EXPANDABLE UP TO 16 PHONES – Up to 16 units can be connected together.
INTERCOM - Call any other phone in your system.
PAGING - Make an announcement through the speaker of a single 2740/2750, or through all the 2740/2750's at
once.
TRANSFER - Answer a call and transfer it to any phone in the system.
PHONE LINE INDICATION - See at a glance which lines are in use.
UP TO 4 LINES - Access up to four separate phone lines.
CALLER ID AND CALL WAITING CALLER ID - For each line subscribed to this service, you may view the
Caller ID information for all incoming calls.

2
PLEASE READ BEFORE INSTALLING AND USING YOUR NEW
TELEPHONE EQUIPMENT.
IMPORTANT SAFETY INSTRUCTIONS
Always follow basic safety precautions when using your telephone equipment to reduce the risk of
fire, electrical shock, and injury.
1. Read and understand all instructions in the Owner’s Instruction Manual.
2. Read all warnings and follow all instructions marked on the product.
3. Unplug this product from the wall outlet before cleaning. Use a damp cloth for cleaning. Do not
use liquid or aerosol cleaners.
4. Do not use the 2742 Cordless Adapter near water. For example, do not use near a bathtub, wash
bowl, kitchen sink, laundry tub, swimming pool, or in a wet basement.
5. Do not place this product on an unstable cart or stand. The product may fall causing serious
damage to the product.
6. Do not place any objects on the telephone line cord. Do not locate the cordless adapter where the
line cords will be walked on.
7. Do not block or cover ventilation slots and openings in the top of the cordless adapter. The
openings should never be blocked by placing a book or paper on top of the adapter. The adapter should
never be placed near or over a radiator or heat register..
8. Never spill liquid on the cordless adapter or push objects of any kind through ventilation slots.
Liquid or objects may touch dangerous voltage points or short out parts that could result in a risk of fire
or electrical shock.
9. Do not disassemble this product. Opening or removing covers may expose you to dangerous
voltages or other risks. Incorrect reassembly can cause electrical shock when the product is
subsequently used.
10. Do not overload outlets and extension cords. Some telephones require AC power from an outlet.
Overloading the outlets can result in the risk of fire or electric shock.
11. Avoid using a telephone (other than a cordless type)during a local thunderstorm. There may be
a remote risk of electrical shock from lightning.
12. Use only the class 2 power transformer indicated in this manual.
13. Do not use a telephone to report a gas leak in the vicinity of the leak.

3
1. UNPACKING AND INSTALLATION
1.1. Box Contents
The following items should be packed with your 2742. Please contact your dealer if any of them is
missing.
2742 Adapter (Main Body) 1 pcs
Line Cord 7ft 2 pcs
Power Adapter (Transformer 9VDC 500 ma) 1 pcs

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1.2. Telephone Part Identification
1 Line 1 & 2 Input Jack 5 Analog Telephone Jack 9 Line 2 Indicator
2 Line 3 & 4 Input Jack 6 Power Transformer 10 Line 3 Indicator
3 Line 1 & 2 Output Jack 7 Power Indicator 11 Line 4 Indicator
4 Line 3 & 4 Output Jack 8 Line 1 Indicator

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2. INSTALLATION
2.1. Overview
The 2742 is part of the 7 Series Multi-line phone system. Up to 16 instruments may be connected in
this system. All these devices use conventional telephone wiring. Total wiring runs between stations
may not exceed 600 feet.
2.2. 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 RJ-11 Single Line Jacks or RJ-14 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 should be done with the provided twisted pair
modular line cords. Please be sure that your modular cords have at least 4 wires in them. If you have
RJ-11 jacks, you will need two line adapters (not included) to connect to the 2742. These couplers
should be available where you purchased your 2742.
2.3 Initial Configuration
2.3.1 Standard Configuration
The 2742 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.
2.3.2 Private Lines
A private line is a telephone number that is connected to only one telephone in the system. No other
phones in the system have access to this telephone line.
2.3.3 Unconnected Lines
It is also permissible to leave one or more lines unconnected.
2.3.4 Line 1
Line 1 MUST be connected to the same incoming line on all phones for the system to function
correctly. Line 1 cannot be a DSL or VoIP line.
2.4. Desk Mount
a. Connect the power transformer to the jack on the back of the 2742. Plug the transformer into a
wall outlet which is not controlled by a wall switch. Use only a 9V DC 500mA, Class 2
transformer.
b. Connect the line cords. If you have RJ-14 line jacks, you need only connect 4wire line cords
between the wall jacks and the jacks in the base of the 2742. If you have RJ-11 line jacks,
you will need 2 line couplers as discussed in Section 3.3.2. Note that the jacks on the 2742
are numbered L1/L2 and L3/L4. Connect your incoming lines accordingly. Use the first two
jacks as Line In.

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2.5. Wall Mount
a. Mount 2742 to the wall.
b. Connect the line cords as described above.
c. Connect the power transformer to the jack on the back of the 2742. Plug the transformer into a
wall outlet which is not controlled by a wall switch. Use only a 9V DC 500mA, Class 2
transformer.
2.6. Verify Proper Installation
This procedure should be used at each telephone after initial installation. It may also be used if you are
having problems with your system. First, verify the three items below at each telephone in the system.
a.. Verify that the AC power transformer is connected to the 2742 and to the mains power.
b. Verify that Line 1 is connected to the 2742.
c. Verify that a station number has been assigned. Go off hook on your cordless phone and dial
another station in your system (01 – 16). The phone should ring and display the incoming
station number. Note that this assumes that the system contains one or more 2740s or 2750s.
Now, verify that Line 1 has been connected correctly to all telephones.
d. Go off hook on your cordless phone and dial 81. Verify that the Line 1 LED is red at each other
station.
To verify the connection of lines 2-4, perform the following steps at each telephone. Note that this
assumes that all lines are connected to all telephones. Remember that Lines 2, 3, and 4 may not be
common.
e. For Line 2, go off hook on your cordless phone and dial 82. Verify that the Line 2 LED is red at
each other station.
f. For Line 3, go off hook on your cordless phone and dial 83. Verify that the Line 3 LED is red at
each other station.
g. For Line 4, go off hook on your cordless phone and dial 84. Verify that the Line 4 LED is red at
each other station.
Note: The cordless adapter will show lines that are seized by other 4 line units. This is shown by a red
led on the front of the unit.

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3. CONFIGURATION MODIFICATION
The default settings after initial power up are given in the table below.
SETTING AVAILABLE OPTIONS
Station Number: 01 Station 02 to 16
CO1: Ringer On On/Off
CO2: Normal, Ringer On Normal w/ Ringer On
Normal w/ Ringer Off
Unconnected
CO3: Normal, Ringer On Normal w/ Ringer On
Normal w/ Ringer Off
Unconnected
CO4: Normal, Ringer On Normal w/ Ringer On
Normal w/ Ringer Off
Unconnected
Flash Time for Cordless Telephone: 600ms 300ms/600ms
3.1. Change Default Setting
Each station must be assigned a different station number.
a. Go off hook from the cordless telephone and get internal dial tone.
b. Dial 6XXYYYYZ6 (see following sections)
XX = The station number to assign, ie; 01 to 16
YYYY = The CO Type setting for each CO Line
0 = Unconnected
1 = Normal w/ Ringer On
2 = Normal w/ Ringer Off
Z = The Flash Timer setting. The two possible setting are
3 = 300ms
6 = 600ms.
The standard setting is 600ms.
If the string is invalid, a no action beep will be heard.
c. Dial tone will be heard again.
c. Hang up to complete the process.
For example, to set station 01 with all four lines with normal ringer on and 600 ms flash time. Dial
“601111166”.