Another All Circuits Error

Discussion in 'Feedback and Suggestions' started by CATV, Apr 17, 2007.

  1. CATV

    Thread Starter Member

    Apr 17, 2007
    If you are continuing to revise, I noticed a mistake in the safety chapter when you said that telephone ring voltage is 48V. In fact, US phone systems use -48V battery but ringing is often 130V 20Hz AC or variations of.

    The series is great and I have used it as a resource to train my employees. WELL DONE!!
  2. Dave

    Retired Moderator

    Nov 17, 2003
    Hi CATV,

    Can you provide a link to the chapter you are refering to?

  3. Dcrunkilton

    E-book Co-ordinator

    Jul 31, 2004
    11 lists: "When an incoming telephone ring signal is applied to the terminals 102 and 104 (typically being at a value of approximately 150 volts and 20 hertz)"

    I have changed the Vol 1, DC, Safety chapter to read 150 Volts. If anyone finds this to be incorrect, please le me know. I am not a telephone expert.