I’m not sure I entirely agree with him in the sense that you could have a parallel system that you could ring a buzzer or bell to the phone to alert the other end of the line that a call was wanting to be answered. Not the phone ringing as such, as we now understand, but a separate set of wires to call attention to the call that needed to be answered by a buzzer or even a light bulb. There is a Gilbert and Sullivan film ‘Topsy-Turvy’ that shows that the telephone system was quite well developed well before Titanic. But with caveats of course.
You might be right in theory Julian, but we have to consider what practical use a telephone system like the one you describe would have been after the accident and more improtantly,
what difference it could have made in the final outcome. Unfortunately, I don't believe that it would have made any.
Given the sheer size and complicated anatomy of the
Titanic, I am sure that the designers would have considered best
practical options for internal communications. Even if you argue that the telephone system that they put in could have been better, that would have applied only to routine exchanges during a normal voyage.
I don’t think we can discard the severe criticism of the “runner system” from the Grenfell Tower Inquiry.
I am sorry but I completely disagree with the comparison, which is like saying that the Allies would have won WW1 much faster if they had used Stealth Bombers against the Imperial German Forces. The Grenfell Tower Fire was in 2017, 105 years after the
Titanic disaster and even discounting the widely different circumstances of the two accidents, contemporary communications and rescue techonolgy and facilties were not even a dream back in 1912. The Officers and crew of the
Titanic had to make do with what they had and under the circumstances and they did the best they could. As Sam and Richard have pointed out, the telephone links they had would have been useful with routine communications during a normal voyage; after the ship impacted with the iceberg, I fully agree with you that either CE Bell or someone under him made a quick call to the bridge about flooding of BR6, which was a key part of the information for
Captain Smith to realize that the damage was serious. But after that, Bell and his team would have been too busy, scattered and on the move with full damage assessment (which, unlike us with hindsight, they had no clear idea of at the time) and no matter what sort of parallel or other telephone system of the time they had in place, it would have been of limited practical use. On the other hand, dispatching runners - trimmers, greasers, any standby crew - would have been the most practical and
flexible method.
We also have to look at this from another angle - if the
Titanic had the most sophisticated parallel (or whatever) shipboard telephone system that they could come up with in 1912, how much difference would it have made either in the circumstances leading to the accident, the ensuing damage and flooding pattern or available counter-measures? Would it have saved any more lives? I think you know the answer.