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Chapter 1 Troubleshooting
Version 1 2006.11.21
A
No
Yes
Check the line type
PSTN?
- A continuous tone is present at
off hook.
- The cable has two conductors.
No
Yes
Request the telephone
company for a line
repair.
No
Yes
Manually dial any local phone
number (e.g. time service) using
touch tone.
- Confirm that the line is not an
ISDN/xDSL/IP phone line but
an analog telephone line.
- If no dial tone is present at off
hook, the line may be faulty.
No
Yes
Check for the pulse.
Manually dial using pulse
20PPM.
C
D
PBX?
The standard cable used for the
conventional analog telephone line
is RJ-11, which has two conductors.
However, the four-conductor cables
commonly available are
backward
compatible with RJ-11 and can be
used with no problem. On the other
hand, since these four-conductor
cables are also used for ISDN
systems, the number of elements is
not the key for identification of the
type of line/service.
Connection
established?
Connection
established?
PSTN
PBX
Is an intermittent
tone present at
off hook?
C
C
Set to pulse 10PPM.
Summary of Contents for 3115CN
Page 1: ...Dell 3115cn Service Manual 23 Mar 2009 ...
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Page 15: ...xii Version 1 2006 11 21 4 6 5 Caution label for Transfer Belt Kmy00007A ...
Page 16: ...xiii Version 1 2006 11 21 4 6 6 Caution label for Duplex Kmy00011GA ...
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Page 361: ...2 20 Chapter 2 Operation of Diag Version 1 2006 11 21 Kmy02042KA Duplex Jam Sensor DI 1 ...
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Page 656: ...5 9 Chapter 5 Parts List Version 1 2006 11 21 Blank Page ...
Page 703: ...5 56 Chapter 5 Parts List Version 3 2009 03 23 PL13 4 Electrical With IIT 1 2 Illustration ...
Page 725: ...6 12 Chapter 6 Principle of Operation Fax Version 1 2006 11 21 Blank Page ...
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