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From: kitty!larry@uunet.uu.net (Larry Lippman)
Newsgroups: comp.dcom.telecom
Subject: Re: Phone Line RF Bypass Needed
Message-ID: <11317@accuvax.nwu.edu>
Date: 25 Aug 90 03:58:42 GMT
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In article <11242@accuvax.nwu.edu> brian@ucsd.edu (Brian Kantor)
writes:

> Does anyone happen to remember the USOC or other ordering code for the
> widget used for bypassing phone line entry to radio transmitter
> buildings?

> We've used one of the CORCOM power line EMI filters to bypass the
> telco line we have, but we're going to be ordering several new lines
> installed in the next few weeks and I'd rather have the "official"
> filter box if I can get it.  Our installer wasn't able to find the
> ordering codes in his references.

	What you want is generally referred to as a 1542AM Filter,
which is used for radio frequency noise suppression on subscriber
telephone lines.  While this is the traditional WECO designation, the
same type number is used by other telephone apparatus vendors, such as
Suttle.  GTE, as an example, calls it an SE1542 Suppressor Filter.

	This device is similar to a modular jack, but on a larger base
with a potted toroidal dual-winding inductor.  The modular jack
version is the 1542AM, but a screw terminal-only 1542A is also
available.  Other vendors, such as Transcom, manufacture multiple
units for simultaneous protection of several pairs.

	I can't easily help you with the USOC code, however.  But if
all else fails, and you *must* have the USOC code, let me know, since
I do have a USOC handbook lying around somewhere.


Larry Lippman @ Recognition Research Corp.  "Have you hugged your cat today?"
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