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Signal Corps • TM .,11-340 , v TELEPHONE CENTRAL OFFICE SET TC-2 C. .. I<OU) ([~N ~~~A lI m;PAnnm:-iT. No. 1 W ... 11 ' . • • J,l., C .• 12 NO'.. JIII ... r 111-1.1. TM 11-840, 19 Ocfoher 1942, is changed ItS fQIl"ws ; 2. Description. • • • • • • • b. Oabinet ll8 - 79 (nwin di8trib"liR.'/ fram,' ) ( fi g". 2).- ( 1) Gn .­ ~ral .-Cabin e t DF...·- i9 i ~ • • • at the ~ \\"it c h h ( ~l n 1. Twelve repeating <XIils C-161 a re fu rnis h ed as part of each cabinet BE-79. These coils are conveniently mounted on the line side of cabinet BE-79 to permit cross connection and cabling so that any repeating coil cnn be connected (between the central omce side of the protectors a nd the switchboa rd cable termi­ nals) into any incoming line as required to es t a blish s implex or phantom cin;uits. (See pa r. 26/, ,) l<'i~", -e 2 shows 1"i!I K' Ht iuj..[ coils C-HH in phwe. (2) Equipmtlil.-C'abinct Bl-';""79 is l~ l ll i ppeJ It S followB: (a) Line .<ide.- l'ruleclot'S ( pl"ott'C I() l" blocks and h~ at coils) III t wo vert kal .... ertiea ls with 40 pHil'S per \· ~ I · t i "" l . Total 1<0 pail.". • • • • • • • ( e) {Joil rack (Supen;eded).-Twl'lve coi ls G-161, In"u nt ",] II ~ shown in figu re 2, are furnished s~ part of w eh cabinet 13&-79. • • • • • • • [ .. G • •"100. ' (II N • • 4a).1 I e 1.12 No. <3.1 4. Setting up and CQnnecting equipment. • • • • • • • o. Oording diogram. • • • • • • • (2) Install the 24 -volt • • • a ll power equipment. If the charging eq uipment causes object ions hie noi,;o: un t he telephone lines, check for bad connections. If connections are satis factory, two banks of batteries will be reqUil-ed , ml O hank being charged while the other is in use. See pa.ragl"aph tl • • • RA-36-:\, D, ~C. • • • • • • • [A. o . 300.' (II S ~. ~ 3 ) . 1 leI.' ~ S o. -\ :q 5. Switchboard operation .-T ho " I',,'ra tiuu or t he sw ikhhoani follow s s tandard Arm y practice. • • • • • • • [ .... o. 300.1 111 So. ~ 3 1.1 Ie '. 12 S O,· ' ~.l .,... iDdl.H! •• 1 lI.m. I~ .hl. ,)nl' _III "" .....p .... n • • • " , d . ....... ,_'0, .......P •• • f •• ~ .... I'........ .....d . ~61 ,;1l ~ ·- . 3 ...",_-.. ,,~ ~ "''JLI~ f (AllfORNIA • T1I[ 11-340 C 1 TEILEPHO:-<E =TH'AL OFFICE svr '1'0-1 26. Cabinet BE-79.- The armng\!IU\!llt of • • ... ot the cabling. Twelve repeating colli 0-16 1 are furnished all part of each TC-2 mounted on the line Iide of cabinet BE-79 below the protectors as sbown in figure 2. • • • • • • • [ .... O. =< 00.1 HI )< O ~ U). J (e 1, 12 So< 41.) 37. Maintenance. • • • • • • • b. Oircuit onaA:er8.- Whcn .. circuit brel\ker opens ill! circuit to protect: the equipment against damage as the result of exces· sive current fl ow, the circuit breaker m ust not be re-doaed until the cause of the exce!!>ive wrN'nt has been detennined and corrected. Aftl'r the cirellit • • • ON 11m) Ol'F. • • • • • • • [ • . (; . • OlU ($ :0:01 U ) .) Ie I. 12 )(0' U.) 44. Lis t of replaceable parts. • • • • • • • c. OuiJiIH·t /lE- i9, moil. Ji~tribllti"!1 frall-.e. ~. ~. MfH.' s ..... M • . N... ~,~.-= :<, 'r::- - -.. -. ll:: N• • • • • • • • ...... ...... ~ ., C<IiI (".,.,. - ....~ .. 'h ........... 5 ' ......... -.- , 100 __.1 ... •• • • • • • • • • • • • • • • 1"'- O. :100.1 ,,:Co. 41).) (e I, 12 No> n .) BT nanl!1l "r T H ~ S l!!CUT"U Q" 11-.. _: O. 0. l1AIISHALL (J ~I~ r or filo" . Qyrlc... .1 .. , J . A. ULIO, .Vn!or On...... I. T~ ~ A"i.. r ~nl On er .. l. • , Or .. , .... f . ..... " . , " ...." . , " " UNWE~\lTY Of CALI fORNI A TM 11-340 "' TJ.:CHNICA I. MAN UAL TELEPHONE- CENTRAL OFFICE SET TC-2 C HA IIU"" I ~R DEPARTMF,:'iT, No.2 W.'811(II0T0'" 25, D. c.., 15 April IfH4. T1>1 11-340, 19 Octobf.r 1942, isch!mged as follows: ApPENDI X ( Aoor.v) MOlllLE FIELD I NSTALLATION USING SHELTER HO-11-(&) OR H0-27-(&) 1. General.-a. TIlis nppendix con tains II. descript.ion or a methOl\ of installing the mobi le Tel"pllol\l' Cellt rll l Office BeL TG-2, including one or two Swifchbo''''tis lID-89 'l1Id ("ubill<'ls nE- 79 (mllin distrib· uting frame), in eithe r Shelter HO-I7-(&) or H0-27- (&) .' The symbol (&) is U5<'d in th is appendix 10 indicllte all models of the equipment named. This method of mounting Telephone Cen trul or· fice Set T G-2 is designed for lise in f l\~t .mov illg SitU8tioll$. h. When T elephone Centrnl OffiC(l Set TG-2 includes only one switchbo8rd lind mllin fr~n H', t116 com plete in~tallation Cll n be made in Slleltcl" HO- 17-(&) or H0-27-(&). If two swirchboards nnd main frames are included , the instllilat.ion requires n trll il cr, l ·ton, two-wheel, cargo, in Addition to t he shelter. Tn both CAses, the shelter j8 mounted in the bOOy of truck, 21f~ -t on, 6 x 6, cargo. 2. Lay:out of equlpment.-a. The arrangement of the equipment in Sheltcr H 0-27- (&) (01' H O-17-(&» for one 0 1' two swi tchboards find main frames is shown ill fil,'111-eS 38 and 39, r<'SI~·ti \·el y . h. Equipment which is fa;;tened down is indicntcd by so lid out­ lines; equipment not fnstclw.1 down is indicnted by Jotted outlill~.~. r. Unfastened eqllil'lIl~nt mll st be I"(!mol'cd from tile shelter before the set is put into operation. 'Sb<It... HO-IT_ (.I.) 0.,1 n0-21_(lr. 1 0'" 1,I,nll' ol .....p t thU .hI.I~ln . I. PN.ldooi JB Iho HO_IT_(&) 10 ''''I" .... ;,,'0,1. .........'h .'" tho " ",It ~ , I. """,I t. hou.., . ",~ J o I"". tlo - Uon. Wb.no .... ' . ,-.U,bl., Sh<ltoc 110_27_(lr.) . ho"l ~ be ~ .... tor the T<J.pho". Cen".1 Ota•• s.t TC-2. L71L;O,'_ H_AOO lIe Dn9. II""" UNIV,~\lTY Of (AllfORNIA TJl 11-MO o. TIo:CUN JCAL MANUAL d. Cording for the electrical connections i~ ~own .. heavy solid lines. The cording is numbered And ero5II-~ferenc::ed in the table at Ole bottom of the figure. The table also list!! the description of t.he cording and its terminal point&. ,. DimensioI\lj a~ given for preferred locationa of fastened equip­ Wlnt and for their points of connection to the sllelter. 3. F utening.-The equipment may be f astened to the shelter by lag screws, u.ggle bolts, or bolts and nuts. The lag screws an!! easiest to install a.nd remove. LIIg scn!!ws, bolts, or 10ggIe bolts should have a body dimension of '18 or % inch. 4. I nat AllAtion.---(I. F04~d eguipment........ The following pro­ cedure is used for hstenillg equipment to the ~helte r by either lag screws., bolts and nuts, or toggle bolts: (1) a,e ollllg .crete, (preferred means).-(a) Drill el098·fitting cl earnn~ holes in the bases of tlte equipment to be fa stened down in the lOCAtions shown in figuro 38 or 39. U9& II. bMloe a.nd auger bit (wood) or a twist drill. (6) Locate Ole equi pment to be Illlltenoo down in the positiOIll indicated in figure 38 or 39. (c) Drill lead holes in the shelter Hoor, using the clearance hOlll9 previously drilled in the bases of the equipment all a guide. Use a hf,.Ild drill or electric drill with II. o/t,-inch twist drill for %,-inch lag IICl"8ws, or n %-inch twist drill for %-inch lag /iCrew&. (d) I nstall Ha t wasbeT3 and lockwashen; under thiliag screw headll to provide additional bearing area and to prevent loosening. A suf­ ficient numbeeof spacing washers should be installed under the acre" heads when required, 8(l that the lag screws will project approxi­ mately % to % inch tllrough the shelter floor. I nsert the lag acre". in the eiearanoo holes in the equipment and screw into the lead holea in the shelter Boor with II wrench. Do flOt dri~ lag ,cre-w. 'lDitl a hammu_ (2) a.. 01 bolt, and 1\11/'.-(0) Arnnge the equipmwt in thIl shelter in accordance with the dimensions shown ill figure as or 39. (b) Elevate the shelter or otherwise provido working sp~ beneath the floor of the shelte r. T ab all necessary precautiol\8 to permit persoll nel to work beneath tJle shelter in safety. (c) After elevating the shelter, ~heek the lecation of thll equip­ ment to be certain that it hilS not moved. Relocnte thll equipmtnt if necessary. , ... 00 If' • o.'9" .• lfrorn UNIVE~\lTY Of CALI fORNI A TM 11-340 TF.LEPHONI!! SET TC-2 0' (d) Drill bolt clenrance holes in the locations specified in figure 38 or 39. Use R twist drill for mnking these hole ~. (e) Inst.u.ll sufficient flat wnshers under the bolt heads so that the holts will not. project below the hottom of the shelter skids; then in­ >iCI·t the holts in the elearance holes. Install flat washers, lock washere, and nutll.. Tighten the nuts, using wrenehes on both the nuts o.nd the bolt heads. (I) Lower the shelter to the ground or relocate it. in the body of the truck. (3) U,e of togg~ bolt".-(a) Arnnge the equipment to be fastened in accordanee with the dimensions shown in figure 38 or 39.
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