Comment 4 for bug 1508215

Command: hp-sendfax -ldebug -f <number> -n <file>
Output:
HP Linux Imaging and Printing System (ver. 3.15.9)
PC Sendfax Utility ver. 9.0

Copyright (c) 2001-15 Hewlett-Packard Development Company, LP
This software comes with ABSOLUTELY NO WARRANTY.
This is free software, and you are welcome to distribute it
under certain conditions. See COPYING file for more details.

hp-sendfax[24790]: debug: getPrinterName(None, None, ['hpfax'], {'fax-type': (<built-in function gt>, 0)})
hp-sendfax[24790]: debug: Mode=2
hp-sendfax[24790]: debug: Cache miss: officejet_6700
hp-sendfax[24790]: debug: Reading file: /usr/share/hplip/data/models/models.dat
hp-sendfax[24790]: debug: Searching for section [officejet_6700] in file /usr/share/hplip/data/models/models.dat
hp-sendfax[24790]: debug: Found section [officejet_6700] in file /usr/share/hplip/data/models/models.dat
hp-sendfax[24790]: debug: ['Officejet_6700_fax']
error: Unable to connect to dbus session bus. org.freedesktop.DBus.Error.NotSupported: Unable to autolaunch a dbus-daemon without a $DISPLAY for X11
error: Unable to initialize dBus. PC send fax requires dBus and hp-systray support. Exiting.