C H A P T E R 7 : O P T I O N S F O R A D V A N C E D U S E R S
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CAS/Robbed Bit protocols, there is no difference between the full trace and
the Layer3 ISDN trace. This differentiation is only relevant for tracing ISDN
protocols. Table 7.5 shows the trace levels for CAS/Robbed Bit protocols.
Trace Level
Description
0 - No Trace
No trace packets are sent from the board to
the user
1 - Full Trace or
2 - Layer3 ISDN Trace
Trace messages are sent from the board to
the user
Table 7.5: The trace levels for CAS/Robbed Bit protocols and their meaning.
When the protocol trace utility is enabled, the trace information is saved in
binary data format to the file
CASTrace0.dat
. This file can be found in the
OPERA™ installation directory. In order to get a readable text file, invoke the
application
CAS_Trace.exe
which is located in the same directory.
CAS_Trace.exe converts the .dat file into the file
CASTrace0.txt
which will
be found in the OPERA™ installation directory, too.
The textual trace file
CASTrace0.txt
is composed of text lines. Each line
depicts an event that has occurred in the protocol for a specific B-channel. In
this regard an event is defined as any change of any kind that occurred in the
protocol’s state machine, i.e. protocol table actions.
The trace line includes the fields that are explained in Table 7.6.
Trace Line Field
Description
No
The serial numberation of the events.
Time
The time of the event in milliseconds.
From
The source of the event that can be DSP (CAS ABCD
change), User (when a call has been placed), or Table
(SET_TIMER table function).
CurrentState
The current state of the Protocol.
Event
The event that happened, for example: EV_PLACE_CALL
from User or EV_TIMER_EXPIRED1 from Table. The
reserved word ‘FUNCTION’ in the event’s field is used for
lines describing the table’s function execution.
NextState
The next state in the table only for events whose source is
table (Table). When the event source is DSP or User, the
value will be as NO_STATE.
Function
The function that is used by the table. When the event
