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PSTN doubt

  • This topic has 2 replies, 1 voice, and was last updated 18 years ago by Arijit.
Viewing 3 posts - 1 through 3 (of 3 total)
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  • 19th September 2002 at 16:00 #22092 Reply
    Arijit
    Guest

    Hi,
    We have 1 pair of wire in local loop but we use 2 pairs for CO to CO connection. Why? Can anyone come out with very good reasoning .
    I will b greatly helped!!!!!!!
    Thanks in advance.

    Arijit

    19th September 2002 at 19:40 #22093 Reply
    Rommel
    Guest

    Analog carrier vs digital carrier.

    2 wire = pots
    4 wire = T1

    20th September 2002 at 07:08 #22094 Reply
    Arijit
    Guest

    Hi Rommel,
    Thanks for ur reply. But unfortunately my doubt is why we use 4 lines instead of 2 lines in T1? What problem we may face if it is 2 line in t1 also?

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Reply To: PSTN doubt
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