Reply to: RE>ISDN and T1 maximum voltage
Dan,
Especially during installations, up to 67 V dc and up to 60 mA can
show up on a T1 or ISDN line. This is fed simplex as to not saturate
the transformers. This is sometimes referred to as sealing current,
used in "welding " the splices together.
My information source is 47 CFR FCC Part 68 rules section
68.318(b)(1)(c).
Eric Petitpierre
Pulsecom
Herndon, VA
[email protected]
>Hello fellow TREG'ers,
>One of my colleagues asked me the following questions and I was
unable to
>provide an answer. I
>would welcome any help from some one who knows.
>The question is what is the maximum voltage and current I can expect
>to get out of a T1 or ISDN line.
>I know the power isn't very high normally, but how much can the max
be?
>I couldn't find an upper limit. References to the correct standards
>would be nice.
