-d | Enable debugging message display. |
-h | Hang up a possibly open telephone connection on the selected interface. |
-k | Send the specified string using the keypad facility information element. |
-n | Dial the specified number on the selected interface. |
-u | Set the unit number to specify the interface used. |
-v | Enable verbose result messages for dialling (-n and -w) |
-w | After dialling (using the -n option), wait for the first result message. |
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