o=; 



i&f=XM53oOT 



p8t^— TITM H I -' 



INSUUTIOH TEST 



OR 



DC TELEGRAPH 



n 



■ TELEPHONE OFFICE 



I "g I CABLE 



SO: 130 I 

 TRANS-, 

 FORMER 



130:600 

 TRANS- 

 FORUER 



34-KC \ AUXILIARY f ' RECEIVII 



INSULATION TEST 



OR 

 OC TELECRAPH 



BAND 



FILTERS CHANNEL 



t U O pULAT OR 



^■TIU^-i'TRrVji 



CHANNEL 2 

 MODULATOR 



DEMODULATOR 



I 1 j-j k-TjJ> — TJin 



-TELEPHONE OFFICE- 



Fig, 8 — Schematic circuit of carrier system on 1930 cable. 



