Egypt maintains an extensive HF diplomatic network. It utilizes the following two digital modes, both broadcast in USB:

  • SITOR-A, centered at +1700 Hz (the startup mode)
  • A commercial off-the-shelf Codan 9001/3012 modem

When a SITOR-A link cannot be established, SITOR-B (also centered at +1700Hz) may be used to broadcast a frequency change request.

Broadcast structure

Ideally, the broadcasts consist of:

  1. Calling the embassy in SITOR-A, with initial chatter
  2. Calling the embassy using the proprietary Codan Chirp calling mode
  3. Transferring messages using the proprietary Codan 9001/3012 data waveform
  4. End of transmission chatter in SITOR-A

However, quite often, SITOR-A is also used to transfer messages, typically in poor conditions. The operator chatter is in Arabic, and encoded using the ATU80 alphabet.

Initial chatter is usually traditional Arabic greetings. When a message is about to be sent, it is often indicated by the phrase "ﺍﺱﺕﻉﺩ" (get ready).

Message structure

Regardless of the mode used to transfer the messages, they follow the same format. There are two different kinds of messages:

  • Offline encrypted 5-digit hex group traffic; uppercase A..F, 1 space between groups, 10 groups per line, trailing space in each line
  • Arabic cleartext

5-digit group messages originating from or addressed to the military intelligence in Cairo use English headers of the following format, line by line:

  1. "From : " followed by the name of the city where the embassy is located, or "71" in case of Cairo
  2. "To : " followed by the name of the city where the embassy is located, or "71" in case of Cairo
  3. "Time & Date : " followed by the timestamp of the message, in the following format: "11:57, Saturday, November 25, 2017"
  4. "Urgent" (no other values are being observed in this line)
  5. A separator in form of a variable number of equal signs

The occasional Arabic messages use simpler Arabic headers:

  1. Three equal signs
  2. "ﻡﻥ : " followed by the name of the city where the embassy is located, or a position name in case of Cairo
  3. "ﺍﻝﻱ : " followed by the name of the city where the embassy is located, or a position name in case of Cairo
  4. Three equal signs

End of message is marked by a variable number of N's.


Contacts always take place with Cairo directly. The stations use different ID's for the SITOR-A and Codan Chirp calling modes, both of which are structured to reflect the part of the world the embassy is in.

Additionally, MFA Cairo has multiple pairs of ID's on the network. While the Chirp ID's are seen every time a Codan link is being established, the SITOR-A ID's are used only in exceptional circumstances.

SITOR-A Chirp Location
MFA Cairo
? 00071 Military intelligence
SSBB 99911 MFA Cairo
SSBE 99913 MFA Cairo
SSBT 99910 MFA Cairo
SSBU 99912 MFA Cairo
SSOU 99942 MFA Cairo
SSTA 99909 MFA Cairo
SSTD 99908 MFA Cairo
SSTE 99903 MFA Cairo
SSTI 99905 MFA Cairo
SSTO 99904 MFA Cairo
SSTR 99906 MFA Cairo
SSTU 99902 MFA Cairo
SSTZ 99907 MFA Cairo
SSUO 99924 MFA Cairo
Muslim States
TVQS 00029 ?
TVQV 00020 Riyadh
TVVC 00006 Baghdad
TVQX 00021 Tehran
TVVF 00008 Beirut
TVVK 00003 Rabat
TVVM 00004 Kuwait City
TVVP 00005 Abu Dhabi
TVVQ 00002 Khartoum
TVVS 00009 Kuwait City
TVVX 00001 Algiers
TVXC 00016 Abidjan
TVXP 00015 Mogadishu
TVXQ 00012 ?
TVXS 00019 Manama
TVXV 00010 Doha
TVXX 00011 Sana'a
TVXY 00017 Muscat
XBKX 11131 Bern
XBPV 11150 ?
XBVA 81109 London
XBVC 11106 Vienna
XBVF 11108 Madrid
XBVK 11103 Bern
XBVM 11104 Berlin
XBVP 11105 Rome
XBVQ 11102 Paris
XBVS 11109 Nicosia
XBVX 11101 Bucharest
XBVY 11107 London
XBXF 11118 ?
Eastern Europe
QQTC 22206 ?
QQTP 22205 Moscow
QQTQ 22202 Belgrade
QQTX 22261 Prague
KKVA 33309 Lagos
KKVB 33301 Addis Ababa
KKVD 33308 Conakry
KKVE 33303 Bamako
KKVI 33305 Dar es Salaam
KKVK ? Accra
KKVO 33304 N'djamena
KKVR 33306 Dakar
KKVU 33302 Accra
KKVZ 33307 Kampala
KKXB 33311 Kinshasa
KKXD 33318 Djibouti
KKXE 33313 Luanda
KKXI 33315 Asmara
KKXO 33314 Abidjan
KKXR 33316 Tunis
KKXT 33310 Nairobi
KKXU 33312 Harare/Accra
OOUS ? ?
OOVC 44406 New Delhi
OOVF 44408 Pyongyang
OOVK 44403 Jakarta
OOVP 44405 Islamabad
OOVQ 44402 Beijing
OOVS 44409 Kuala Lumpur
OOVX 44401 Ankara
OOVY 44407 ?
Latin America
IPTX 55501 Havana
North America
RCVB 66601 Washington, D.C.

Source: UDXF

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