CONFIDENTIAL
FM HONG KONG
TO IMMEDIATE FCO
TELNO 1624
OF 220927Z MAY 91
INFO IMMEDIATE PEKING
CONFIDENTIAL
HILC 193/1 (REPLACE)
(AMENDED DISTRIBUTION 23/5/91)
INFO PRIORITY UKREP JLG HONG KONG
056735
MDHIAN 8110
to replace earhe
veria
TOP COPY
Q DIST?
Rad 2875.
MIPT: ALLOCATION OF CALL SIGNS
PAPER BEGINS
FUTURE ARRANGEMENTS FOR INTERNATIONAL RADIO CALL SIGNS
INTRODUCTION
1. AT PRESENT RADIO STATIONS LICENSED IN HONG KONG USE CALL SIGNS
ALLOCATED TO THE UNITED KINGDOM. IN ORDER TO AVOID DISRUPTION TO SHIPPING, AIRCRAFT AND COMMUNICATION SERVICES IT IS NECESSARY FOR BRITISH AND CHINESE SIDES TO AGREE TO SUITABLE ARRANGEMENTS WHICH
CAN EXTEND BEYOND 1 JULY 1997.
BACKGROUND
2. THE RADIO REGULATIONS (RR) ATTACHED TO THE INTERNATIONAL TELECOMMUNICATION CONVENTION, NAIROBI 1982, PROVIDE THAT ALL RADIO TRANSMISSIONS SHALL BE CAPABLE OF BEING IDENTIFIED (RR 2055). THE PURPOSE OF SUCH REQUIREMENT IS TO FACILITATE THE IDENTIFICATION OF RADIO INTERFERENCE. ONE MEANS OF IDENTIFYING A
RADIO TRANSMISSION IS FOR THE ORIGINATOR OF THE TRANSMISSION TO
SEND A CALL SIGN TO IDENTIFY THE RADIO STATION.
3. RADIO STATIONS WHICH ARE OPEN TO INTERNATIONAL PUBLIC CORRESPONDENCE SERVICE, AMATEUR STATIONS AND OTHER STATIONS WHICH ARE CAPABLE OF CAUSING HARMFUL INTERFERENCE BEYOND THEIR NATIONAL
BOUNDARIES ARE REQUIRED TO HAVE THEIR OWN UNIQUE CALL SIGNS DRAWN FROM THE INTERNATIONAL SERIES FOR THEIR COUNTRIES (RR 2082). INTERNATIONAL CALL SIGN SERIES ARE ALLOCATED BY ADMINISTRATIVE
RADIO CONFERENCES OF THE INTERNATIONAL TELECOMMUNICATION UNION (ITU) TO MEMBER STATES, WHO ARE THEN RESPONSIBLE FOR ASSIGNING UNIQUE CALL SIGNS TO RADIO STATIONS UNDER THEIR JURISDICTION (RR 2089).
4. INTERNATIONAL CALL SIGNS COMPRISE THREE TO SEVEN CHARACTERS, MADE UP OF A COMBINATION OF LETTERS OR A MIX OF NUMBERS AND
1
PAGE
CONFIDENTIAL