Homepage
Crypto
Index
Glossary
Enigma
Hagelin
Fialka
Rotor
Pin-wheel
Voice
Data
Hand
OTP
EMU
HSM
Mixers
Phones
Bulk
FILL
Codebooks
Algorithms
Chips
Cryptanalysis
Toys
World War II
Countries
Manufacturers
Spy radio
Burst encoders
Intercept
Covert
Radio
PC
Telex
Telephones
People
Agencies
Manufacturers
DONATE
Publications
Standards
For sale
Kits
Shop
News
Events
Wanted
Contact
About us
Links
 
 
  		Click for homepage
← UK
Data
  
BID/620   EDC
Telex trunk encryption device - this page is a stub

BID/620, or BID/620-EDC, was an automatic data encryption/decryption system, used by the British Army from 1967 onwards, for securing multiplexed (MUX) digital telegraphic data over radio links, also known as Telex Over Radio (TOR). The unit was capable of handling up to four 50 baud data channels simultaneously, with an aggregated throughput of 200 baud. As the system has built-in Error Detection and Correction capabilities (EDC), the abbreviation EDC is often associated with the model number. EDC is also known as Automatic Repetition Request (ARQ).

  1. EDC = Error Detection & Correction.

Help wanted
At present we have no further information about the BID/620 and related equipment, but several documents relating to the BID/620 and its use are available through the National Archives in Kew (UK). You can help expanding this page by supplying additional information. → Contact us


Versions
  • BID/620-EDC
  • BID/620-HU
  • BID/620-HU 20
  • BID/620-HU 120
Related NSN numbers
The following National Stock Numbers (NSN) 1 are known in relation to the BID/620 [1]:

  • BID/620/1
    NSN 5810-99-106-2641
  • PSU (?)
    NSN 5810-99-106-2642
  • BID/620/4
    NSN 5810-99-106-2643
  • BID/620/5
    NSN 5810-99-106-2644
  • BID/620/2 Unit 1
    NSN 5810-99-106-2654
  • BID/620/2 Unit 2
    NSN 5810-99-106-2655
  • BID/620/2 Unit 3
    NSN 5810-99-106-2656
  • BID/620/2 Unit 4
    NSN 5810-99-106-2657
  • BID/620/2 Unit 5
    NSN 5810-99-106-2658
  • BID/620/2 Unit 6
    NSN 5810-99-106-2659
  • BID/620/2 Unit 7
    NSN 5810-99-106-2660
  • BID/620/2 Unit 8
    NSN 5810-99-106-2661
  • BID/620/2 Unit 9
    NSN 5810-99-106-2662
  • BID/620/2 Unit 10
    NSN 5810-99-106-2663
  • BID/620/2 Unit 11
    NSN 5810-99-106-2664
  • BID/620/2 Unit 12
    NSN 5810-99-106-2655
  • BID/620/2 Unit 13
    NSN 5810-99-106-2656
  • BID/620/2 Unit 14
    NSN 5810-99-106-2657
  1. NSN is also known as Nato Stock Number.

Glossary
ARQ   Automatic Repetition Request
EDC   Error Detection & Correction
MUX   Multiplex
General acronym for multiplexed data signals.
TOR   Telex Over Radio
Also known as Radio Teletype (RTTY). (More)
Documentation
  1. The use of the BID/620-EDC system in the Naval Strategic Trunk Network and
    recommendations resulting from the BID/620-EDC system trial over the UK-Mauritius circuit
    1967. XCT-67-12. The National Archives, Kew (UK), ADM 220/1985.

  2. System control concepts when using BID/620-EDC and the philosophy of operation of the BID/620-EDC
    1967. XCT-67-13. The National Archives, Kew (UK), ADM 220/1886.

  3. Report on the BID/620-EDC trial equipment at the UK Termial
    1967. XCT-67-14. The National Archives, Kew (UK), ADM 220/1887.

  4. Operating techniques: BID/620-HU 20 series EDC
    1967. XCT-67-15. The National Archives, Kew (UK), ADM 220/1888.

  5. BID/620-HU 120 series EDC: operating techniques
    1969. XCT-69-2. The National Archives, Kew (UK), ADM 220/1895.
References
  1. ISO Parts (website), Military and Aviation Parts
    Retrieved February 2016.
Further information
Any links shown in red are currently unavailable. If you like the information on this website, why not make a donation?
© Crypto Museum. Created: Monday 08 February 2016. Last changed: Sunday, 25 February 2018 - 13:48 CET.
Click for homepage