I'K.ii iic.ii. .irri.ic.tTiox oi- riir. tk.iwmissiox r.v// 4H 



rrtisstalk units to 11' than from crosstalk units to mill's. Crosstalk 

 tnav Ih! ronwrti-ii from rrosstalk units to 77' as follows; 



lr..»ialk in 77' = -JO I 



No. of Crosstalk UnitsN 



/No. of 



10« 



Till- nuntlivr of J'i' rorrt-spondinj; to crrlain nunihiTs of crosstalk 

 units arc whole numhcrs and ari- therefore, easy to remen)hcr as 

 shown in the following; table. 



( rosstalk in Terms 



of Tl' Loss Crosstalk I'nits 



8U t(K) 



60 1,(MM) 



.14 (.Approx.'i 2.000 



40 lO.OtK) 



20 100,000 



("oNCI.fsioN 



From this discussion the conclusion tna\- Ik- drawn that the adop- 

 tion of the TU in place of the mile as the imit of telephone trans- 

 mission can be readily accomplished in its jiractical application in 

 the plant. During the transition period, before complete lists of the 

 new data ha\-e been compiled, and before the measuring apparatus 

 in use has all been changed to the new basis, frequent conversions 

 between miles and TU will be necessan.'. These conversions can 

 easily be made by multiplying by the proper conversion factor. 



