Abstracts of Bell System Technical Pa])ers 

 Not Published in this Journal 



AiKENS, A. J./ and C S. Thaeler.- 



Control of Noise and Crosstalk on Nl Carrier Systems, A.I.E.E. 

 Trans., Commun. A: Electronics, 9, pp. 605-Gll, Nov., 1953. 



Benedict, T. S.^ 



Microwave Observation of the Collision Frequency of Holes in 

 Germanium, Letter to the Editor, Phys. Rev., 91, pp. 1565-1566, 

 Sept. 15, 1953. 



Bexxett, "W.i 



Telephone System Applications of Recorded Machine Announce- 

 ments, Elec. Eng., 72, pp. 975-980, Nov., 1953. 



Applications of voice-recording equipment discussed in some detail can be 

 divided into four general groups: Announcements made directly to and 

 providing a ser\'ice to subscribers, such as weather forecasts and the time 

 of day; announcements to assist subscribers in connection with telephone 

 service, that is, intercept announcements when an individual calls a vacant 

 or disconnected terminal, or emergency announcements if an unusual 

 condition prevents normal service; announcements to expedite service 

 and assist operators in completing calls, including completion of calls from 

 a dial to a non-dial phone, and advising operators of the time delay for 

 completing long distance calls; and si)ecialized announcement or record- 

 ing services, such as price quotation and ticket reservation. 



* Certain of these papers arc available as Bell System Monofjr.'iphs and may be 

 obtained on re(iuest to the puhHcation Department, IJcll Tch>])lu)n(' Laboratories, 

 Inc., 463 West Street, New York 14, N. Y. For ])apers avaihible in this form, the 

 monograph number is given in parentheses following the date of pubHcation, and 

 this number should be given in all recjuests. 



' Bell Telephone Laboratories. 



2 American Telephone and Telegraph Company. 



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