The Care and Feeding of ISDN4BSD
8.1 Setting the debug	8 The isdndebug Utility	9 The isdnmonitor Utility

8.2 Getting Statistics

The second use of isdndebug is to get low level statistics.

By using the -c switch, isdndebug will show some chipset dependent statistics for chipsets which supports this feature, again, this is only of use if you have the sources for reference to interpret what you see.

With the -q switch, the statistics for the D-channel layer 2 (LAPD protocol / Q.921 protocol) will be shown.