Page 532 of 536
Chapter 25 — Fault locating and clearing
553-3121-210
Standard 3.0
January 1999
Symptom:
No ring on 500- and 2500-type telephones
Both 500- and 2500-type telephones do not ring. One or several sets in the
same cabinet are experiencing the problem. Look up all system messages in
the Option 11C Compact software guide and follow the instructions given. If
the fault does not clear, use this procedure.
Constantly observe and look up system messages as you perform this
procedure.
You may need to replace:
•
Ringing Generator: NTMW11 power supply
•
Peripheral Equipment (PE) circuit card
•
Telephone
•
Wiring to the telephone
Possible cause
Action
Defective telephone
If only one telephone is affected, replace it.
If there is still a telephone problem, go to the next possible cause.
Defective wiring
If only one telephone is affected, make sure wiring is properly
connected and wires are not interchanged, crossed, or grounded.
Check the wiring between the telephone and the cross-connect
terminal.
Check the wiring between the PE shelf and the cross-connect
terminal.
If there is a wiring problem, correct it.
If there is still a telephone problem, go to the next possible cause.
—continued—
Содержание Meridian Meridian 1
Страница 3: ...553 3121 210 Standard 3 0 January 1999 ...
Страница 17: ...xiv Contents 553 3121 210 Standard 3 0 January 1999 ...
Страница 89: ...Page 70 of 536 Chapter 6 Bracing cabinets against earthquakes 553 3121 210 Standard 3 0 January 1999 ...
Страница 97: ...Page 78 of 536 Chapter 8 Installing a new system 553 3121 210 Standard 3 0 January 1999 ...
Страница 107: ...Page 88 of 536 Chapter 10 Installing the system ground 553 3121 210 Standard 3 0 January 1999 ...
Страница 113: ...Page 94 of 536 Chapter 11 Installing the power supply 553 3121 210 Standard 3 0 January 1999 ...
Страница 125: ...Page 106 of 536 Chapter 12 Adding an expansion cabinet 553 3121 210 Standard 3 0 January 1999 ...
Страница 139: ...Page 120 of 536 Chapter 13 Installing the circuit cards 553 3121 210 Standard 3 0 January 1999 ...
Страница 157: ...Page 138 of 536 Chapter 15 Installing and connecting SDI and Ethernet ports 553 3121 210 Standard 3 0 January 1999 ...
Страница 175: ...Page 156 of 536 Chapter 16 Starting up and testing the system 553 3121 210 Standard 3 0 January 1999 ...
Страница 209: ...Page 190 of 536 Chapter 18 Connecting the trunks 553 3121 210 Standard 3 0 January 1999 ...
Страница 323: ...Page 304 of 536 Chapter 21 Installing Hospitality 553 3121 210 Standard 3 0 January 1999 ...
Страница 419: ...Page 400 of 536 Chapter 23 Pre programmed data 553 3121 210 Standard 3 0 January 1999 ...
Страница 455: ...Page 436 of 536 Chapter 24 Changing pre programmed data 553 3121 210 Standard 3 0 January 1999 ...
Страница 555: ...Page 536 of 536 Chapter 25 Fault locating and clearing 553 3121 210 Standard 3 0 January 1999 ...