Hello,
An excellent source of information is the Encyclopedia Titanica (http://www.encyclopedia-titanica.org/speed_v_revolutions.html), where one can see that there is only a linkage between the bridge telegraphs and those of the engine room, no hydraulic/electric or mechanic device, only the telegraphs and human intervention.
Well, it was not specific to Titanic, and it means that there are some possible scenarios indeed.
Hoping it is not once more the revival of rumors?
Regards,
Luc
The Telemotors on the bridge were for the rudder steering