FCC PART68 number 中的REN 是什么意思

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请问一下FCC part 68 number 中的REN 是什么意思，代表什么参数

H-RH

Ringer equivalence number
8 q* |( D( E6 @6 I  \5 A% ghttp://en.wikipedia.org/wiki/Ringer_equivalence_number

In telecommunication, a ringer equivalence number (REN) is a somewhat arbitrary number which denotes the electrical load a telephone ringer has on the line. In the U.S., this is determined in accordance with ANSI/TIA-968-B (August 2009).

9 K8 w+ v1 X7 PREN is a United States-developed yardstick, but analogous systems exist internationally. In some countries, (particularly in Commonwealth nations), the REN is better known as the ringer approximated loading number (RAL).

1 u- |9 z$ w' E# [: ^/ aIn the United Kingdom it is called the ringer equivalence number and a maximum of 4 is allowed on any British Telecom (BT) line.

* L; \1 [% {3 A9 bIn Canada it is called a Load Number (LN); which cannot exceed 100. (The LN of each device represents the percentage of total load allowed).
' d* h% }3 d2 S3 @: \; o) r
In the United States 1 REN was formerly equivalent to a 6930Ω resistor in series with an 8 µF (microfarad) capacitor. The modern ANSI/TIA-968-B specification (August 2009) defines 1 REN as an impedance of 7000Ω at 20Hz (type A), or 8000Ω from 15Hz to 68Hz (type B).
" I7 |5 L) ^/ {) f+ \
3 a6 p. v) A; E3 S! {In Europe 1 REN used to be equivalent to an 1800Ω resistor in series with a 1 µF capacitor. The latest ETSI specification (2003-09) calls for 1 REN to be greater than 16 kΩ at 25 Hz and 50 Hz.

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引用第1楼H-RH于2011-04-28 13:34发表的  :
- v6 O1 X5 G' zRinger equivalence number
http://en.wikipedia.org/wiki/Ringer_equivalence_number
! P+ ]) I7 H/ X- H9 i; t) B  p
In telecommunication, a ringer equivalence number (REN) is a somewhat arbitrary number which denotes the electrical load a telephone ringer has on the line. In the U.S., this is determined in accordance with ANSI/TIA-968-B (August 2009).

1 r% p4 Q+ V$ r: z2 j: C.......

谢谢H-RH.

b122741814

楼上说的很清楚了
谢谢