Vertical Edge 120 Specifications Page 86
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TECHNICAL PROBLEM SOLUTIONS DX-120 Installation and Maintenance Manual
- 80 -
No sound heard
over loudspeaker
in speakerphone
mode.
Another digital
telephone
Connection /
component failure
1) Press the SPK button.
2) Listen for dial tone over the loudspeaker.
3) Call a working extension.
NOTE
The called extension should use the
handset for this test.
4) Verify two-way connection.
If the called extension cannot hear your voice:
5) Verify that MUTE is not enabled (i.e., status
lamp flashing red).
6) Lift the handset and verify two-way connection
using handset.
If verified as a speakerphone problem:
7) Replace the telephone.
Static and / or
noise can be heard
during a
conversation
Process of
elimination.
Industry standard
technician testing
tools (lineman's
test set, etc.)
Another extension If only static is heard when connected to a
specific extension during an intercom call:
Examine that extension.
Station cabling/MDF
wiring
If static exists on all calls:
1) Check station cabling/wiring and all MDF
connections.
2) Correct any problems.
Extension apparatus If noise persists:
1) Change-out swappable components (handset,
handset cord).
If noise continues:
2) Try a known good extension connected to this
station cable.
Static and / or noise can be heard during a conversation (continued on next page)
Diagnostic Quick Reference Chart (continued)
Symptom(s) Diagnostic Aid Cause(s) Action
- Technical Manual - Volume I 1
- TABLE OF CONTENTS 3
- Table of Contents (continued) 4
- REGULATIONS 8
- FCC PART 68 INFORMATION 9
- TERMS AND DEFINITIONS 10
- Regulations (continued) 11
- SECTION 1 - INTRODUCTION 13
- Locating Documentation 14
- OVERVIEW 15
- - 10 16
- Configuration 17
- VOICE PROCESSING MODULES 18
- CONFIGURATION TABLE 19
- - 14 20
- Key Service Unit 21
- Power Supply 22
- - 17 23
- 408M (KSU1 Component) 24
- 408E (KSU II Component) 25
- - 20 26
- - 21 27
- - 22 28
- - 23 29
- MDM (Modem Module) 30
- - 25 31
- T1 Card (T1 Module) Details 32
- - 27 33
- - 28 34
- - 29 35
- - 30 36
- Specifications 37
- SYSTEM CRITERIA AND CAPACITY 38
- - 33 39
- - 34 40
- ELECTRICAL DATA 41
- ENVIRONMENTAL DATA 41
- UNIT (COMPONENT) DETAIL 42
- WIRING DATA 43
- REGULATORY DATA 44
- SIGNALING (INTERNAL) DATA 44
- - 39 45
- SECTION 2 - INSTALLATION 47
- Site Planning 48
- Tools and Supplies 49
- MOUNTING THE KSU 50
- - 45 51
- KSU Wiring 52
- - 47 53
- Typical MDF Installation 54
- KSU Components 55
- REPLACING A 408M OR 408E 56
- KSU ASSEMBLY – ADD-ON MODULES 57
- ADDING A DPM8 58
- - 53 59
- Adding an APM4 60
- - 55 61
- Adding a COM4 62
- - 57 63
- Adding an MDM 64
- - 59 65
- Adding an AAM 66
- Adding a KSU2 Second Cabinet 67
- - 62 68
- Adding a Music Source 69
- - 64 70
- Adding an External Pager 71
- - 66 72
- - 67 73
- - 68 74
- - 69 75
- - 70 76
- - 71 77
- - 72 78
- - 73 79
- - 74 80
- SYSTEM MAINTENANCE 81
- TECHNICAL PROBLEM SOLUTIONS 81
- Diagnostic Quick Reference 82
- - 77 83
- - 78 84
- - 79 85
- - 80 86
- - 81 87
- MAINTENANCE UTILITIES 88
- CONNECTING TO THE SYSTEM 89
- - 84 90
- - 85 91
- - 86 92
- - 87 93
- ACCESSING PC-DBA MAINTENANCE 94
- CONFIGURATION 95
- DIAGNOSTICS 96
- - 91 97
- - 92 98
- - 93 99
- - 94 100
- - 95 101
- - 96 102
- - 97 103
- - 98 104
- SW/HW REVISION 105
- - 100 106
- - 101 107
- - 102 108
- - 103 109
- - 104 110
- LOGON DATA 111
- REMOTE CONTROL 111
- - 106 112
- - 107 113
- - 108 114
- - 109 115
- T1 MAINTENANCE 116
- - 111 117
- - 112 118
- - 113 119
- - 114 120
- - 115 121
- - 116 122
- - 117 123
- - 118 124
- Ringing a Group Of Phones 125
- - 120 126
- INSKIN VOICE MAIL 127
- Using Multiple Lines & 128
- - 123 129
- - 124 130
- - 125 131
- - 126 132
- You must enable ECF 132
- - 127 133
- - 128 134
- Digits Passed Inband to 135
- - 130 136
- Numerics 139
- DX120L-IMM-0107 146
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