Manual / Guide · 1938
Crossbar Dial System: Illustrations of Crossbar Equipment — Bell System (training) (1938)
24 pp (6 MB copy; the 42 MB scan was skipped). Crossbar switches of the 755A's era
Manual / Guide · 1938
24 pp (6 MB copy; the 42 MB scan was skipped). Crossbar switches of the 755A's era
CROSSBAR DIAL SYSTEM ILLUSTRATIONS OF CROSSBAR EQUIPMENT BELL TELEPHONE^ LABORATORIES, INC, SYSTEMS DEVELOPMENT DEPARTMENT 463 WEST STREET NEW YORK CITY (ISSUED FOR training PURPOSES ONLY) M3 Tare jA!a HAaeeoR.o >* - iAGaaOfiO Ti/ISVSqiUy 3 T,t ’'.Vv',',’' <v '1 ("i. )iV '% , .H'.-i^-i T 5''; , . .S Wv gyiOITAfSi -iUJ Jf PVjiO ^ .V .r. W iy) )‘^r'UM ;>v';/;!Am HC'-i • ' ^ '^‘^l 1 amts hhiihkfctbikhlihfchhhhhh giiiaiMi r ibbiliibiiiiiiiililiiil Ms#k«s4fti itssss :ass:;a$;xi Fig. 1 - Line Link Frame with Three Primary Bays Page 1 1 : V V r-i - "IIVVWW jpprjisi* n I iBifnrnryi'o i;ssiii 'KsnijijncTi T. rivm shy* ^'’nnnm tit y y i •iminrBSv i r y f rv'i mm ;»»BKtTfrrry "»*!00!yiT:i' ItJRBtiniTrriii'rr'i'rii'i’itYavwi? r HSliillSSg' i¥t¥? TCnOMP :jKHii 5 !?iy ry Tiytsniyfvj t rri y Tumasi;! rit r jHBismti'ii'p'y' jRH iyiyuif ry f '**!T5n:nrt;y ri i >jiiam iii;rryy : ^OTnrj i3:y.iTr I < i yri'savxairufi^ I iiTjuMaas. STJ'jrj y Sf ‘vsnn.jirri T y « y rryrliSSwal,' J|g ir m i't t T 'f T~ " '" " t ' ' ry f yfiTViiawNMF ^^ • ii}ISii»fSSSSF lMjiiM555S‘ < y » y I y I y f «¥iiiiiiHrF *B:nniiiy!i 1 1 1 1 y y i wy awaiiyLi' «mi!!i?;s]nsn5ss£ grrrrrryr TK^nirri 1 f JVHif yii r TKinniii 1 1 Fig. 2 - Subscriber Sender Link, District Junctor and District Link Frames (From Left to Right) Page 2 Subscriber Sender Frame — rr- Fig. 5 - Originating Marker Connector' Frame Fig, 6 - Originating Marker Frame Relay Bay - Showing Originating Bay and Route Page 5 'r:'Vs^>^ f5 -^4' f' IFig, Page 6 7 - Line Junctor Grouping Frame Fig, 8 - Office Link Frame anni^Tii ilmS PTOwniw Fig. 9 - Terminating Sender Link, Incoming Trunk and Incoming Linlc Frames (From Left to Right) U (D I }=i S’!0) •H CO . . "S e rc> fH 0 EH ClO •H Page 8 cd Pi fin Casing Doors Open Casing Doors Closed Fig. 12 - Terminating Marker Frame Page 9 Fig. 13 - Number Group Connector Frame Page 10 Fig. 14 - Block Relay Frame Page 11 ^ig. Page 12 15 - Line Choice Connector Frame Fig. 16 - Line Junctor Connector Frame Fig. 17 - Line Distributing Frame Page 13 i ! - Originating Sender Test, Sender Make Busy, Originating Trouble Indicator, Terminating Trouble Indicator and Incoming Trunk Test Frames (From Left to Right) Fig. 18 - Maintenance Center Page 14 Fig. 19 - Miscellaneous Relay Rack - Apparatus Side Page 15 r illtiUHWHWiW . ^mmmi: il mmmm _mmalfiMmmfia ; ilirtiWillH'tiiMi *1 Xfi^i^irECEErc y»' * ^ ^ J* i-^ ^«WM«)M<j,i‘jijVjj. tii jj^IHlg! e Fig. 20 Page 16 - Miscellaneous Relay Rack - Wiring Side 'I 4ii ii'iii iiiii Fig. 4 4 HI a i 21 - General View of Llain Cross Aisle, Showing Conduit and Power Feeders Page 17 "wjS jnHuiu?? '‘‘‘i;tt-‘!*aK!A-i Fig. 22 - General View of Cross Aisle Page 18 Fig. 23 - Switchboard 8, 8-1/2^ Panel Section 6* -2” High Page 19 19 Pages o mm V 4^ t \ A , \ iu