. Automatic telephony; a comprehensive treatise on automatic and semi-automatic systems . gher as we go to the right. Third Selector BanWs (One Level Only) Toll A G B H C I D J sels I I I I I II I i . I | I o-oâo-oâI \-M Connectors 0â0âoâo-l - I - I -I â2 zJ\\Combined Toll 9â9 â 9â9-9-9-9-9 5-0 and Regular 8â1-6-5-4-J-i-| 4-0 7 â6- 5 â4-3-J- I -8 5-0 6â5 â4â3-f-l -8-7 4-0 *â4- 3-z-l-sâ t-s 7-o Reqular Connectors 4 â 3-2â1-8-7-6-5 8-0 J â 2- 1-8-7-6-5-4 9-Q 2â | â8 â 7 â 6-5â4-3 10âJ |â8 â7 â6-5-4-3-Z 11-3 1â1â1â1â1-1 â|-| 12-0 iâi-i- |-i-1-1-1 u-Q IâIââIârâtâiâi 14-3 Fig. 136.âSelectors (3d) t
. Automatic telephony; a comprehensive treatise on automatic and semi-automatic systems . gher as we go to the right. Third Selector BanWs (One Level Only) Toll A G B H C I D J sels I I I I I II I i . I | I o-oâo-oâI \-M Connectors 0â0âoâo-l - I - I -I â2 zJ\\Combined Toll 9â9 â 9â9-9-9-9-9 5-0 and Regular 8â1-6-5-4-J-i-| 4-0 7 â6- 5 â4-3-J- I -8 5-0 6â5 â4â3-f-l -8-7 4-0 *â4- 3-z-l-sâ t-s 7-o Reqular Connectors 4 â 3-2â1-8-7-6-5 8-0 J â 2- 1-8-7-6-5-4 9-Q 2â | â8 â 7 â 6-5â4-3 10âJ |â8 â7 â6-5-4-3-Z 11-3 1â1â1â1â1-1 â|-| 12-0 iâi-i- |-i-1-1-1 u-Q IâIââIârâtâiâi 14-3 Fig. 136.âSelectors (3d) trunking into 14 switches (scheme). Seventeen connectors may be connected in two ways, of which one isshown in Fig. 138. Twelve sections of selectors are divided into twoparts, six sections each for the first seven contacts. They unite withoutslip on the last three contacts. Connectors Combined Toll Regular â¢*: and Regular 14 15 12 II 10 9 8 7 6 5 4- 3 Z I Contacts I Z 3456769 0-Toll Selector Bank. 2 3 4 5 6 7 8 9Number of Contacts Fig. 137.âSelectors (3d) trunking into 14 switches (terminal connections). The first five contacts are slipped in the regular way, and there areno individual trunks. Contacts 6 and 7 are not slipped. There are five toll and regular connectors, numbered 1 to 5. The tollselectors hunt over them in that same order. But the local selectors 144 A U TOM A TIC TELEPIION Y hunt in the opposite direction, so that what is first choice for one is lastchoice for the other. The other way of connecting 17 connectors is shown in Fig. 139. Itis alike except that there is more scattering on the toll and regularconnectors and less on the regular connectors. Third Selector Banks (One Level Only) Toll 3rdAGBHCIDJEKFL Sel. 0â0 â 0 â 0 â 0â0 â 0â0 0â0â0 â 0 9â9 â 9â9 â 9â9â9â9 â 9 â 9 â 9â9 8â8 â 8â8â8 â 8- 7â7 â 7â7â7 â 7- 6 â 6â6â6â6â6- 5â4 â 3 â 2â Iâ5- 4â3â 2â Iâ4â5- 3 â 2â
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Keywords: ., bookcentury1900, bookdecade1920, booksubjecttelephone, bookyear19
