Simple command line interface to SFLphone SIP client, using the DBus interface.
NOTE: This is currently a very trivial implementation with no real error checking.
dial <number> [<account alias>]-- dial the number directly. If no account alias is specified, the last used account is reused for the call.callback-- call back the last person in the call history, whether incoming, outgoing or a missed call.hangup-- hangup all ongoing calls.