Telephotic Code

I was asked if there would ever be a telesonic code. I said, yes haven't you heard? It's called "shouting"

— Magi Timmas

  The Telephotic code was created by Magi Timmas after perfecting the art of changing the color of a lantern's flame and fitting a snappable cover that allow the user to cause a 'flash' of light. Timmas then devised the Telephotic Code to assist in sending messages: as time has gone, this code has been adapted into other uses as well.   The Telephotic Code was originally developed with Mercian in mind, hence the associated to the twenty-six letters of the Mercian Alphabet, but some other Olivian Languages have their own translation.  

Requirements

  The Telephotic Code requires three lanterns, lit with a different color flame, and with the capacity to flash each lantern separately. Each lantern should be a line either horizontal or vertical (the Elpan Eyries use vertical configurations mostly). The lanterns are also required to hold their flash for either a long period or a short period.  

Translation to the Mercian Alphabet

  The following tables use the following method for transcribing a Telephotic Letter; there are three characters. X indicates a blocked light, I a short flash and O a long flash. If there is a long flash, the long flash is held until the short flash is made. Between letters, all lanterns will go dark (XXX)  

Mercian Character	Telephotic Letter
A	XIX
E	XXI
I	IXX
O	OXI
U	IXI
Y	OIX
B	IOI
D	XIO
G	OOX
P	III
T	OXX
C	OXO
M	OII
N	IIO
S	XOX
F	IOO
Z	OOO
V	XII
H	XOI
R	IXO
L	XOO
W	OOI
J	OIO
CH	IOX
TH	XXO
DH	IIX