https://declassified.library.utoronto.ca/files/original/ac5cbee0d53205fa51c2c67980e78553.pdf b5ef7741f8182af77fd67a07a8acf6ff PDF Text Text Document disclosed under the Access to Information Act Document, divulgue en,».ertu de la Loijur I'acces a /'inferukationi ~>J^ S ' G R f f FROM: Col PD S a i t h , MBEJ CD~ ~ ~ Director HC SIGS _ _ tf» ,/QA «• /'L$&~~'^* Jf* ' HQTS1260-B-0-1 (D Sigs) <0^ Juno 64 ARM? HEADQUARTERS OTTAWA /*, Ontario Dear ^ Tour letter of 22 I-iiy expressed concern lest previous agreements ray have boon set aside with the possible result that efficiency in handling Alerts Flash traffic might bo itspaired. >t wish to assure you that this is not the caso. ' >'. You trill reaenber that a "black box" is involved whioh is intendod to remove tho circuits from tlio STRAD upon the receipt of a warning. \\j engineers ircro getting down to tho final design of the circuit layout in tho: switching centre when it -occurred to thera that the reliability, of tho black box night bo less than that of STRAD. The substitution would in'such a'case /:•:' bo unvrise* The probabilities of STRAD causing a delay in tho transmission of -tlie Message was carefully examined and it was concluded that such a probability was indeed low. Lt. Col. Gillett therefore rocoranended that the automatic feature of the'black box bo deleted, and that it bo arranged to be. a manual over-ride of .-. the STEAD. . ' This arrangement becomes simplo and foolproof. The circuits handling tho Alerts Finish traffic regain connected to STRAD. Upon receipt of tho i-jarning message symbols previously agreed, a lamp vail light indicating to tho supervisor that an Alerts Flash message is on the way. Ho can then, by pressing a switch, activate a reperforator -which is in series with the STRAD Input circuit, giving hit', a tape copy of the high precedence traffic. He will observe the outgoing circuits on STRAD which by lamps will indicate whether tho mesfsage is being passed to the other ttjo addressees. If for sono reason STRAD does not immediately fort-jard the nessage, he can take the tape copy and push it out on TD's switched In Manually in place of STRAD. When he reconnects the circuits to STRAD, tho latter will then transmit the noscage, , thus -aending it twice, once from the tape and once from STRAD . storage* - • .'"•.-•' 1 With this arrangement, by pressing appropriate switches, the entire relay function can be performed raanually, with greater facility than at present, if for eono reason it is decided not to allow STRAD to handle it or if thero is a failure of the latter. We cannot conceive of any mechanism of failure of this arrangement and in fact believe it can only result in cutting tho present short tin© the message stays in tho Ottawa relay centre. Lt. Col. Gillett will be writing to J_r. Sail, shortly to give him tho revised plan in greater dotail. - �Document disclosed under the Access to Informatio^AcM Document diyulgyp,errv§rtu,de \$J^JfacJ'pcces qI'jaffyrmq I _KS"E3a :: V 1 •E 'EEE 5 f •• t •-* > ~ 2I trust -that this explanation has reassured you that ray intentions are to maintain, and if possible improve, the present handling of this high precedence traffic* Yours sincerely. W*iT» Sharpe Esq*j • Director Diplomatic Wireless Service, Foreign'Office p E" ...'•'.' . S* tffol.. - . , ' . • • London- &igLas_ct« ./.'' . i. •'-1 '•• ) r •••//' i . 'f.'--~. 7 " y '/i. * /• <'•'-. ,"•/• ' /•- •1 r'|" Y!\\. f'j-_IBE3SI ( V --_--_____ •u... 000074 � Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Hydra Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Identifier An unambiguous reference to the resource within a given context HY00204 Title A name given to the resource [Alerts Black Box] Date A point or period of time associated with an event in the lifecycle of the resource 06/30/1964 Source A related resource from which the described resource is derived Hydra Communications - Policy, RG24, 1250-36 Vol. 2, Library and Archives Canada (LAC) Creator An entity primarily responsible for making the resource Department of National Defence Rights Information about rights held in and over the resource Canadian Crown Subject The topic of the resource Emergency planning, Emergency communications, EASE, STRAD, Tripartite Alerts Description An account of the resource Letter from P.D. Smith to W.J. Sharpe, Deputy Director, Diplomatic Wireless Services pertaining to elimination of "black box" for Alerts traffic. Smith assures Sharpe that Alerts flash will not be delayed with deletion of "black box" as supervisor will receive visual indication of Alerts message - a lit lamp. Publisher An entity responsible for making the resource available Canada Declassified Type The nature or genre of the resource Text Format The file format, physical medium, or dimensions of the resource PDF Language A language of the resource en