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ISDNDEBUG(8)              BSD System Manager's Manual             ISDNDEBUG(8)

NAME
     isdndebug -- display and control isdn4bsd kernel variables and statistics

SYNOPSIS
     isdndebug [-c] [-e] [-g] [-l layer] [-m] [-q] [-r] [-s value] [-u unit]
               [-z] [-C] [-Q]

DESCRIPTION
     The isdndebug utility is part of the isdn4bsd package and is used to con-
     trol the level of debugging output of the isdn4bsd kernel part.  Every
     layer of the isdn4bsd kernel uses a debugging mask which can be manipu-
     lated using this utility.

     A second usage of isdndebug is to display and reset chipset specific sta-
     tistics and/or error counters and to display and reset the D-channel
     layer 2 (Q.921 LAPD protocol) statistics and error counters.

     The following options are available:

     -c      Display chipset specific statistics and/or error counters.

     -e      Set debugging mask for the selected layer(s) to display errors
             only.

     -g      Get the debugging mask for the selected layer(s).

     -l      Specify the layer for which a command applies.  Default is all
             layers.

     -m      Set debugging mask for the selected layer(s) to display all pos-
             sible debugging messages (maximum output).

     -q      Display the Q.921 (D-channel layer 2) frame receive/transmit sta-
             tistics.

     -r      Set debugging mask for the selected layer(s) to the compiled in
             default (reset).

     -s      Set debugging mask for the selected layer(s) to value.  Value can
             be specified in any number base supported by sscanf(3).

     -u      Set the unit numbers for the -c, -q, -C and -Q flags.

     -z      Set debugging mask for the selected layer(s) to no output at all
             (zero).

     -H      Reset the chipset specific statistics and/or error counters to
             zero.

     -Q      Reset the Q.921 (D-channel layer 2) frame receive/transmit sta-
             tistics to zero.

FILES
     /dev/i4bctl

EXAMPLES
     The command:

           isdndebug -g

     displays the current debugging level for all ISDN layers

AUTHORS
     The isdndebug utility and this manpage were written by Hellmuth Michaelis
     <hmATkts.org>.

BSD                              May 31, 2000                              BSD