<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def callRemote(self, *a, **kw):
 """ Make a callRemote request of the JSONRPCClientFactory. """

        if not self.running:
            return defer.fail(ServiceStopped())
        return self.clientFactory.callRemote(*a, **kw)