Unnamed Administration sources reported that [EMAIL PROTECTED] said:
>
> Typically, a "600 ohm line" indicates an impedance typical for audio and
> telco use. The math is a follows. A 1 milliwatt input on a 600 ohm is
> typically 0.775 volt AC and represent a 0 dB level. This is milliwatt,
> generated by the telco as a reference signal to determine line loss on a
> cable pair. The frequency is generally 1004 Hz.
Total trivia.
Bell used to use 1000hz. But an interaction with the clocks of the
original digitizing of audio ("T-Carrier") of that exact frequency
caused significant errors in the level measurement. Moving to
1004 solved the issue. Somewhere I have an BSP telling more.
--
A host is a host from coast to [EMAIL PROTECTED]
& no one will talk to a host that's close........[v].(301) 56-LINUX
Unless the host (that isn't close).........................pob 1433
is busy, hung or dead....................................20915-1433
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