Recommendation ITU-R M.1677-1

Recommendation ITU-R M.1677-1

(10/2009)

International Morse code

M Series

Mobile, radiodetermination, amateur

and related satellite services

ii

Rec. ITU-R M.1677-1

Foreword

The role of the Radiocommunication Sector is to ensure the rational, equitable, efficient and economical use of the

radio-frequency spectrum by all radiocommunication services, including satellite services, and carry out studies without

limit of frequency range on the basis of which Recommendations are adopted.

The regulatory and policy functions of the Radiocommunication Sector are performed by World and Regional

Radiocommunication Conferences and Radiocommunication Assemblies supported by Study Groups.

Policy on Intellectual Property Right (IPR)

ITU-R policy on IPR is described in the Common Patent Policy for ITU-T/ITU-R/ISO/IEC referenced in Annex 1 of

Resolution ITU-R 1. Forms to be used for the submission of patent statements and licensing declarations by patent

holders are available from where the Guidelines for Implementation of the

Common Patent Policy for ITU-T/ITU-R/ISO/IEC and the ITU-R patent information database can also be found.

Series of ITU-R Recommendations

(Also available online at )

Series

BO

BR

BS

BT

F

M

P

RA

RS

S

SA

SF

SM

SNG

TF

V

Title

Satellite delivery

Recording for production, archival and play-out; film for television

Broadcasting service (sound)

Broadcasting service (television)

Fixed service

Mobile, radiodetermination, amateur and related satellite services

Radiowave propagation

Radio astronomy

Remote sensing systems

Fixed-satellite service

Space applications and meteorology

Frequency sharing and coordination between fixed-satellite and fixed service systems

Spectrum management

Satellite news gathering

Time signals and frequency standards emissions

Vocabulary and related subjects

Note: This ITU-R Recommendation was approved in English under the procedure detailed in Resolution ITU-R 1.

Electronic Publication

Geneva, 2009

? ITU 2009

All rights reserved. No part of this publication may be reproduced, by any means whatsoever, without written permission of ITU.

Rec. ITU-R M.1677-1

1

RECOMMENDATION ITU-R M.1677-1*

International Morse code

(2004-2009)

Scope

This Recommendation confirms the International Morse code characters and the operational provisions

applying to their use in radiocommunication services*.

The ITU Radiocommunication Assembly,

considering

a)

that versions of the Morse code have been in use since 1844;

b)

that it continues to be used in some radiocommunication services including the amateur and

amateur-satellite services, and to a diminishing extent in the mobile and fixed services;

c)

that the code needs to be updated from time-to-time to meet the needs of the

radiocommunication services,

recommends

1

that Annex 1 should be used to define the Morse code characters and their applications in

the radiocommunication services.

*

Division B of ITU-T Recommendation F.1, which also addressed the Morse code, has been withdrawn.

2

Rec. ITU-R M.1677-1

Annex 1

Operational provisions applying to Morse working

Part I ¨C Morse code

1

Morse code signals

1.1

The following are the written characters that may be used and the corresponding Morse

code signals:

1.1.1

Letters

accented

1.1.2

a

.?

i

..

r

.?.

b

?...

j

.???

s

...

c

?.?.

k

?.?

t

?

d

?..

l

.?..

u

..?

e

.

m

??

v

...?

e

..?..

n

?.

w

.??

f

..?.

o

???

x

?..?

g

??.

p

.??.

y

?.??

h

....

q

??.?

z

??..

Figures

1

2

3

4

5

.????

..???

... ??

....?

.....

6

7

8

9

0

?....

??...

??? ..

????.

?????

Rec. ITU-R M.1677-1

1.1.3

3

Punctuation marks and miscellaneous signs

Full stop (period) ...........................................................

[.]

.?.?.?

Comma ..........................................................................

[,]

??..??

Colon or division sign....................................................

[:]

???...

Question mark (note of interrogation or request for

repetition of a transmission not understood) .................

[?]

..??..

Apostrophe.....................................................................

[¡¯]

.????.

Hyphen or dash or subtraction sign ...............................

[¨C]

?....?

Fraction bar or division sign ..........................................

[/]

?..?.

Left-hand bracket (parenthesis) .....................................

[(]

?.??.

Right-hand bracket (parenthesis) ...................................

[)]

?.??.?

Inverted commas (quotation marks) (before and after

the words) ......................................................................

[¡° ¡±] . ? . . ? .

Double hyphen...............................................................

[=]

Understood.....................................................................

...?.

Error (eight dots)............................................................

........

Cross or addition sign ....................................................

[+]

Invitation to transmit......................................................

?.?

Wait

.?...

..........................................................................

?...?

.?.?.

End of work ...................................................................

...?.?

Starting signal (to precede every transmission).............

?.?.?

Multiplication sign.........................................................

[¡Á]

Commercial at1 ¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­

[@] .¨C ¨C .¨C .

?..?

2

Spacing and length of the signals

2.1

A dash is equal to three dots.

2.2

The space between the signals forming the same letter is equal to one dot.

2.3

The space between two letters is equal to three dots.

2.4

The space between two words is equal to seven dots.

1

Vocabulary note: In December 2002, the French General Committee on Terminology approved the term

¡°arobase¡± for the @ symbol used in e-mail addresses.

 ................
................

In order to avoid copyright disputes, this page is only a partial summary.

Google Online Preview   Download