Dell 3115CN, Service Manual

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Chapter 1 Troubleshooting
Version 1 2006.11.21
Arrow Symbol Semantics
Protocol Monitor displays various symbols in combination with arrows (--> / <--) depending on the
communication status. Listed below are examples of symbols and their semantics. They may vary
depending on the model.
Some models display simple arrows (
→
/
←
) without symbols in Protocol Monitor.
Signals sent:
Signals received:
-->
Normal. Yes
-+>
Underrun was detected at the MODEM. No
-F>
STOP instruction was given during image data transmis-
sion.
No
-@>
FTT was forcefully sent out. No
<--
Normal. Yes
<x-
A CRC error was detected. No
<#-
An aborted sequence was detected. No
<!-
No carrier was detected for 1.5 seconds during image
data reception.
No
<=-
No carrier was detected for 150 milliseconds during
image data reception.
No
</-
FSK was detected during TCF signal reception. No
<+-
An overrun was detected at the modem. No
<A-
Failed to detect EOL during the 10-second timeout. No
<B-
Buffer became full during image reception. No
<C-
Failed to detect any normal line for 60 seconds during
image data reception.
No
<D-
Failed to decode normal lines for 60 seconds after image
data reception.
No
<E-
Interframe timeout occurred during image data reception
in ECM mode.
No
<F-
STOP instruction was given during image data reception. No
Symbol Semant
ics Relevance to Dell 3115cn
Symbol Semantic
s Relevance to Dell 3115cn