The practical telephone handbook and guide to the telephonic exchange (1906)
Poole, Joseph · New York, Macmillan Co. · leaf 453
r to givestrength to withstand the verygreat water pressure to which the cable is subjected. Theouter armouring is composed of 32 iron wires each 375 m.m.diameter. The Pupin coils are inserted into the core atdistances apart of 1100 yards for each circuit but at points550 yards apart on the cable.… … Fig. 412 CapacityInductanceAttenuation FactorSpeaking Range 900 frequency 1*77 sq. m.m.335 ohms.20 ohms. 0-039 m.f. 0-21 henry. 0-0072.347 kilometres. SUBMARINE TELEPHONE CABLES 425 Jtl 0 CO O LO OS t> 0 OS eSuBy; 0 CO CO 00 00 TfH 0 0 rooj CO CM 1-1 co 1-1 co ■** CM terra CO 0 0 10 10 •Un3IQ[…
Telephone
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