Disconnect all connections if telecomm unbinds to the service.

        return mBinder;

    }

    /** {@inheritDoc} */

    @Override

    public boolean onUnbind(Intent intent) {

        endAllConnections();

        return super.onUnbind(intent);

    }

    /**

     * This can be used by telecomm to either create a new outgoing call or attach to an existing

     * incoming call. In either case, telecomm will cycle through a set of services and call

        }

        return sNullConference;

    }

    private void endAllConnections() {

        // Unbound from telecomm.  We should end all connections and conferences.

        for (Connection connection : mIdByConnection.keySet()) {

            // only operate on top-level calls. Conference calls will be removed on their own.

            if (connection.getConference() == null) {

                connection.onDisconnect();

            }

        }

        for (Conference conference : mIdByConference.keySet()) {

            conference.onDisconnect();

        }

    }

}