| -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 possible debugging messages (maximum output). |
| -q | Display the Q.921 (D-channel layer 2) frame receive/transmit statistics. |
| -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 statistics to zero. |
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