# gvoice -b -e firstname.lastname@example.org -p wtfpasswd call 18664254745 1CALLBKNUMBER 3
I got a error saying Login failed.
I found at this thread that it's probably due to recent changes in the Google voice web login interface. And after I have the following in the file /usr/lib/python2.7/site-packages/googlevoice/settings.py (the folder might be python2.6 depending on the python version installed), it works again and gvoice can dial out without any problems
LOGIN = 'https://accounts.google.com/ServiceLogin?service=grandcentral&passive=1209600&continue=https://www.google.com/voice&followup=https://www.google.com/voice<mpl=open'