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Internet Message Format  |  1992-09-09  |  963 b 
  1. Path: sparky!uunet!zaphod.mps.ohio-state.edu!news.acns.nwu.edu!telecom-request
  2. Date: Wed, 9 Sep 1992 14:21:14 GMT
  3. From: jvz@pt.com (John Zambito)
  4. Newsgroups: comp.dcom.telecom
  5. Subject: Re: Information Wanted on E&M Signaling Technology
  6. Message-ID: <telecom12.697.13@eecs.nwu.edu>
  7. Organization: Performance Technologies, Incorporated
  8. Sender: Telecom@eecs.nwu.edu
  9. Approved: Telecom@eecs.nwu.edu
  10. X-Submissions-To: telecom@eecs.nwu.edu
  11. X-Administrivia-To: telecom-request@eecs.nwu.edu
  12. X-Telecom-Digest: Volume 12, Issue 697, Message 13 of 13
  13. Lines: 14
  14.  
  15. apollo@n2sun1.ccl.itri.org.tw (Yee-Lee Shyong) writes:
  16.  
  17. > Why do telecommunication professionals always say -48Vdc not +48Vdc?
  18.  
  19. According to Bellcore:
  20.  
  21. "Because of corrosion problems, the use of supply potentials that are
  22. positive relative to ground reference is not recommended."
  23.  
  24.  
  25. John Zambito, Performance Technologies Incorporated    jvz@pt.com
  26. 315 Science Parkway, Rochester, New York 14620    uupsi!ptsys1!jvz
  27.  
  28.