I ni.ni'llOXE TR.-l.\SMISSIO\- M.IIMI-.X.IXCr. II 



Willi .1 li'sling pi. Ill of lliis kind l.irijr ,iiims ciii In.' ciiM-ri-d li\ .1 >m.ill 

 ir.ufliii^ font' willi .1 small anuuiiil of Uslin^; c(|uipimiii. Iliis 

 ii'siills ill .1 wry rcoiioniical Ir.insiiiission Icstiii^ program wliili- al 

 ilie saim- limo insuring; lliat Iraiismissioii coiulilioiis ar»> maintaiiu-d 

 -.ilisif.ictoriK . 



I-ig. 10 shows a tjpicai Iraiismissioii icsliiig team layout. The 

 It-am is C(]uippod with an automobile which proves an economica> 

 means ol ir.insportation between offices and exchange areas and 



fTTEk 



Fig. 10 — Illustration cf a T\p 



Testing Team Layout 



pro\ides a con\enicnt meth(jd for carrying the testing equipment. 

 During transportation this equipment is packed in padded trunks 

 which insures against injun,-. In this particular case the equipment 

 includes, in addition to transmission testing sets and oscillators, other 

 apparatus such as a wheatstone bridge, crosstalk set and noise measur- 

 ing set so that other maintenance work may be done in connection 

 with tran^mi^ision testing whenever this is desired. 



Results Accomplished 



The results accomplished in transmission maintenance work can 

 best be appreciated by considering the kinds of troubles which ad- 

 versely affect transmission and which can be detected and eliminatetl 

 by routine testing methods. Consideration is first given to the general 

 causes of troubles which are detrimental to both toll nnrl jural trans- 



