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isdndecode (8)
  • >> isdndecode (8) ( FreeBSD man: Команды системного администрирования )

  • BSD mandoc
     

    NAME

    
    
    isdndecode
    
     - isdn4bsd ISDN protocol decode utility
    
     
    

    SYNOPSIS

    [-a ] [-b ] [-d ] [-f filename ] [-h ] [-i ] [-l ] [-o ] [-p filename ] [-u number ] [-x ] [-B ] [-P ] [-R unit ] [-T unit ]  

    DESCRIPTION

    The utility is part of the isdn4bsd package and is used to provide the user with a detailed mnemonic display of the layers 1, 2 and 3 protocol activities on the D channel and hex dump of the B channel(s) activities.

    Together with two passive supported cards and an easy to build cable it can also be used to monitor the complete traffic on a S0 bus providing S0 bus analyzer features.

    The utility is only available for passive supported cards.

    The following options can be used:

    -a
    Run in analyzer mode by using two passive cards and a custom cable which can be build as described in the file cable.txt in the isdn4bsd source distribution. One card acts as a receiver for the transmitting direction on the S0 bus while the other card acts as a receiver for the receiving direction on the S0 bus. Complete traffic monitoring is possible using this setup.
    -b
    switch B channel tracing on (default off).
    -d
    switch D channel tracing off (default on).
    -f
    Use filename as the name of a file into which to write tracing output (default filename is isdndecode<n> where n is the number of the unit to decode).
    -h
    switch display of header off (default on).
    -i
    print layer 1 (I.430) INFO signals to monitor layer 1 activity (default off).
    -l
    switch displaying of Layer 2 (Q.921) frames off (default on).
    -o
    switch off writing decode output to a file (default on).
    -p
    Use filename as the name of a file used for the -B and -P options (default filename is isdntracebin<n> where n is the number of the unit to decode).
    -u
    Use number as the unit number of the controller card to decode (default 0).
    -x
    Decode Layer 3 packets with an unknown protocol discriminator.
    -B
    Write undecoded binary decode data to a file for later or remote analyzing (default off).
    -P
    Read undecoded binary decode data from file instead from device (default off).
    -R
    Use unit as the receiving interface unit number in analyze mode.
    -T
    Use unit as the transmitting interface unit number in analyze mode.

    When the USR1 signal is sent to a process, the currently used logfiles are reopened, so that logfile rotation becomes possible.

    The decode output should be obvious. It is very handy to have the following standard texts available when tracing ISDN protocols:

    I.430
    ISDN BRI layer 1 protocol description.
    Q.921
    ISDN D-channel layer 2 protocol description.
    Q.931
    ISDN D-channel layer 3 protocol description.

     

    FILES

    /dev/i4btrc<n>
    The devicefile(s) used to get the decode messages for ISDN card unit <n> out of the kernel.

     

    EXAMPLES

    The command:
    isdndecode -f /var/tmp/isdn.decode
    

    will start D channel tracing on passive controller 0 with all except B channel tracing enabled and logs everything into the output file /var/tmp/isdn.decode.  

    SEE ALSO

    isdnd(8)  

    STANDARDS

    ITU Recommendations I.430, Q.920, Q.921, Q.930, Q.931

    ITU Recommendation Q.932 (03/93), Q.950 (03/93)

    ETSI Recommendation ETS 300 179 (10/92), ETS 300 180 (10/92)

    ETSI Recommendation ETS 300 181 (04/93), ETS 300 182 (04/93)

    ITU Recommendation X.208, X.209  

    AUTHORS

    The utility and this manual page were written by An Hellmuth Michaelis Aq [email protected] .  

    BUGS

    Still one left.


     

    Index

    NAME
    SYNOPSIS
    DESCRIPTION
    FILES
    EXAMPLES
    SEE ALSO
    STANDARDS
    AUTHORS
    BUGS


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