Ah, makes sense.
My guess is, it is only in the last 10 to 15 years that typing in all caps is considered shouting.
And, since they had so much practice at it, I bet most operators could send “STOP” in about the same amount of time as a period.
IIRC a musician (I’m thinking Mason Williams) wrote a little book that included a “telegram poem” with lines like:
I FIRST MET YOU AT A BUS STOP
AND THE SIGHT OF YOU MADE MY HEART STOP
Can’t find a cite, saw the book maybe 30 years ago.
Pretty decent answer in that link:
Most telegraph messages (after the very early years) were transmitted using the Baudot code (or in America, the Murray variation of it). Those are 5 bit codes, so a maximum of 32 characters. The alphabet takes 26 (upper case only, no room for lower case), 1 for a space, leaving 5 characters remaining. Not enough room for a full set of punctuation characters, those were used for control characters. There wasn’t even room for the 10 digits, those had to be sent with an extra figure shift before them.
So you couldn’t use lower case or periods in a telegraph message – there was no such character to send.
I found this interesting:
Is this still true with USPS? Can I address a letter to my Congressman in Washington and get it sent there without a street address?
Also, I’m going to start giving out my address as “His, Excellency,…”
I don’t know, either, but in J-school in the mid-90s, we were still typing (or writing) “-more-” at the bottom of pages that continued to the next and “-30-” for the last page of news stories we’d hand in for assignments.
Journalists used to use cablese to reduce the number of words in an international cable; this [probably apocryphal] exchange supposedly passed between the London Daily Telegraph’s office and their man in the Congo:-
WHY UNNEWS QUERY
-
UNNEWS HERE STOP
-
UNNEWS THERE UNJOB HERE STOP
-
UPSTICKJOB ARSEWARDS STOP RUDE LETTER FOLLOWS STOP
Evelyn Waugh’s novel Scoop famously contains several examples
UNPROCEED LAKUWARD STOP … REMAIN CONTACTING CUMREDS STOP NEWS EXYOU UNRECEIVED STOP DAILY HARD NEWS ESSENTIALIST STOP…
I always wondered if it worked the same way in German. It seems like You can put a whole sentence into a compound noun in German if you try hard enough.
There was a maximum number of characters in a word.
There were all sorts of rules and sub-rules to keep things from getting out of hand. Some examples:
Plain language messages (i. e., neither Code nor Cipher) may be written in any language that can be expressed in Roman letters. In such messages each word of fifteen letters or less is counted as a word, and words of over fifteen letters are counted at the rate of fifteen letters or fractions of fifteen letters to a word,
Code messages may contain words belonging to one or more of the following languages: English, French, German, Italian, Dutch, Portuguese, Spanish and Latin. The use of words of other languages is not allowed. Code messages may also contain artificial words-that is, groups of letters so combined as to be pronounceable in at least one of the eight admitted languages. In code messages each code word (whether genuine or artificial) of ten letters or less is counted as a word, and no code word of more than ten letters can be accepted. If any words in plain language, and of more than ten letters each, are used in code messages, they should be counted at the rate of ten letters or fraction of ten letters to a word.
In cipher messages, which may be composed of groups of figures or of groups of letters, the groups are counted at the rate of five figures or letters, or fraction thereof, to a word. Words in plain language inserted in such messages are counted as instructed in plain language messages.
COUNTING OF WORDS, ETC.
When the letters “ch” come together in the spelling of a dictionary word, they are counted as one letter. In artificial words the combination is counted as two letters.
Inverted commas, the two signs of the parenthesis and each separate figure, letter, underline or character will be counted as one word.
Signs of punctuation, hyphens and apostrophes are not counted or sent except upon formal demand of the sender, in which case they will be charged for as one word each.
Groups of figures will be counted and charged for at the rate of five figures, or fraction thereof, as one word. Decimal points and commas, used in the formation of numbers, also bars of division and letters added to figures to form ordinal numbers, are to be counted as figures and charged for at the rate of five figures or fraction thereof, as one word.
Words joined by a hyphen or separated by an apostrophe are counted as so many separate words.
Abbreviated and misspelled words and illegitimate compound words and words combined in a manner contrary to the usages of any of the languages authorized, are inadmissible.
Here’s a booklet from 1928 on “How to write telegrams properly” - it has some interesting information. The Telegraph Office -- A Tribute to Morse Telegraphy and Resource for Wire and Wireless Telegraph Historians and Collectors
Interesting reading.