AT&T MLC-6 Instruction Manual Page 107
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- Table of contents
- BOOKMARKS
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Troubleshooting
The charts on pages B-3 to B-7 describe various difficulties that might occur, possible causes for
the difficulty, and procedures you can follow to try to solve the problem yourself.
Table B-2. Troubleshooting
Problem
Do This
If...
Then...
1. All Phones
Dead: No
Dial Tone
or Lights
2. Multiple
Phones
Dead: No
Dial Tone
or Lights
Possible Cause
1. Control unit not
receiving power.
2. The power outlet
may be faulty.
1. One system
module out.
2. Several system
modules out.
3. Expansion cable
not properly
connected.
4. Expansion carrier
not receiving power.
Make sure the control
unit’s power cord is
plugged securely into
the wall outlet. Also
make sure all circuit
breakers (little plastic
pop-up tabs shown in
Figure 1-1) are in the
“ON” position (pushed
down). To see circuit
breakers, remove the
control unit’s cover.
Test the outlet by
plugging in an ap-
pliance, like a lamp or
radio.
Check the LEDs on
the front of the system
modules. If a single
green LED is out, try
reseating the module
in the carrier (see
page 2-7).
If several LEDs are
out, try reseating the
leftmost module of the
ones with the lights
out.
Check the connection.
Make sure the cable is
secure at both ends.
Make sure the power
cord is plugged into
the wall outlet and all
circuit breakers are in
the “ON” position.
Power up the expan-
sion carrier first, then
the primary carrier.
The green indicator
lights on the
modules are “ON”
and the trouble is
gone.
The green indicator
lights on the
modules are “ON”
but the trouble
remains.
The green indicator
lights on the
modules are “OFF,”
The green indicator
lights on the
modules are
“FLASHING,”
The appliance does
not work,
The appliance works,
LEDs light,
Problem remains,
LEDs light,
Problem remains,
The LEDs light,
The problem
remains,
The LEDs light,
The problem
remains,
The problem is
corrected.
Call 1 800 628-2888.
Go to Possible Cause 2.
Call 1 800 628-2888.
The outlet is faulty.
Plug the control unit
into a different outlet,
check fuse box, or call
an electrician.
Call 1 800 628-2888.
Problem is solved,
Call 1 800 628-2888.
Problem is solved.
Go to Possible Cause 3.
Problem is solved.
Go to Possible Cause 4.
Problem is solved.
Call 1 800 628-2888.
Maintenance and Customer Support B-3
- PARTNER™ 1
- Communications System 1
- Release 1 1
- Installation and Use 1
- Contents 3
- About This Guide 5
- Terminology 6
- Reference Materials 6
- How to Comment on This Guide 6
- Overview 7
- Features and Capabilities 9
- System Components 11
- Control Unit 12
- System Modules 12
- System Capacity 12
- Telephones 13
- System Telephones 13
- Other Devices 15
- Installing the Hardware 17
- Important Safety Instructions 18
- Line and Extension Numbering 20
- Combination Extensions 21
- An Example System Setup 22
- Installation Procedures 24
- WARNING: 25
- 2-8 26
- Assembling System Phones 27
- # ] button for five seconds 28
- # ] button, lift the 28
- Replacing a System Module 30
- Programming 31
- Procedure 32
- Page Procedure Page 32
- 3-ii 32
- Initial System Setup 34
- Copy Settings 34
- Changing the System Clock 35
- Adding New Lines 35
- Adding New Extensions 35
- System Programming 36
- 3-6 Programming 38
- Pickup Groups 40
- Calling Groups 40
- Extension Hunt Groups 41
- Night Service 42
- System Speed Dialing 44
- System Programming Procedures 45
- 3-14 46
- System Programming Reference 48
- ✔ = Factory Setting 48
- System Speed Dial 52
- Programming Reference 52
- Telephone Programming 53
- Personal Speed Dialing 54
- Programming Telephone Buttons 54
- Backup Programming Extension 55
- 3-24 Programming 56
- SPEED DIALING 58
- DIAL-CODE FEATURES 58
- Extension Programming 59
- Using Telephones 60
- Buttons and Indicators 62
- 4-4 Using Telephones 64
- Ringing Patterns 65
- Dial Tones 65
- Speakerphone Performance Tips 66
- Standard Telephones 67
- Using the Switchhook 68
- Limitations 68
- 4-10 Using Telephones 70
- Dial-Code Features 71
- Intercom ] [ 8 ] 74
- Answering a Call 78
- On a System Phone* 79
- On a Standard Phone 79
- To answer a call ringing 79
- Putting a Call on Hold 80
- Transfer ] or [ Hold ].) 81
- Transfer ] 81
- ✳ ] plus the 81
- Making a Conference Call 82
- Joining a Call 83
- Forwarding Calls 83
- Loudspeaker Paging 84
- Using Night Service 84
- Using Auxiliary Equipment 85
- Light Pattern 88
- Indicates 88
- Setting Up Fax Machines 89
- Single Fax Machine 90
- Fax Line Saver 90
- Send and Receive Fax Machines 90
- Answering Machines 92
- Personal Answering Machine 94
- Send and Receive Modem 95
- Automated Attendants 97
- Credit Card Scanners 98
- Night Service with 99
- Call Reporting Devices (SMDR) 100
- Considerations 101
- Serial Printers 101
- Call Accounting Devices 102
- Speed Dial Form 103
- Maintenance 105
- In Case of Difficulty 106
- Repair Information 112
- AT&T Limited Warranty and 112
- Limitation of Liability 112
- Product Ordering Information 114
- SOURCE (U.S.) 115
- System Modules and Wiring: 115
- Specifications 116
- FCC Information 118
- D-2 FCC Information 119
- Index IN-1 120
- IN-2 Index 121
- Index IN-3 122
- IN-4 Index 123
- Index IN-5 124
- IN-6 Index 125
- System Lines 127
- Extensions 127
- Auxiliary Equipment 128
- 518-455-310 129
- Graphics © AT&T 1988 129
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