Exhibit 99.1

FOR IMMEDIATE RELEASE

CONTACT:                                                CONTACT:
J. Brad McGee                                           Jay W. Thomas
Tyco International (US) Inc.                            AFC Cable Systems, Inc.
Senior Vice President                                   Director of Marketing
(603) 778-9700                                          (508) 998-1131


             AFC CABLE AND TYCO FIX EXCHANGE RATIO FOR THEIR PENDING
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                                  MERGER AT 1:1

         Hamilton,  Bermuda  and  Providence,  RI,  November  18,  1999  -  Tyco
International Ltd. (NYSE-TYC, LSE-TYI, BSX-TYC), a diversified manufacturing and
service  company,  and AFC Cable Systems,  Inc.  (NASDAQ-AFCX) a manufacturer of
prewired armor cable, announced today that they have agreed to an exchange ratio
for their pending merger pursuant to which AFC Cable  shareholders  will receive
one Tyco common share for each share of the approximately 12.8 million shares of
AFC Cable shares outstanding.

         Pursuant to the terms of the merger agreement,  AFC Cable had the right
to cause Tyco to  proceed  with the  merger if AFC Cable  agreed to an  exchange
ratio of 0.987 Tyco  common  shares  for each  share of AFC Cable.  Tyco had the
right to cause  AFC  Cable to  proceed  with the  merger  if Tyco  agreed  to an
exchange  ratio of 1.04466 Tyco common  shares for each share of AFC Cable.  The
two companies mutually agreed today to proceed with the transaction on the basis
of a one-for-one  exchange ratio. The closing price today for Tyco common shares
on the New York Stock Exchange was $44.875.  AFC Cable shareholders will vote on
the merger at a meeting scheduled for November 22, 1999.

         "AFC Cable provides an excellent  range of products that complement our
Allied Tube & Conduit  electrical  products," said L. Dennis  Kozlowski,  Tyco's
Chairman and Chief Executive Officer.  "The combination of AFC Cable's offerings
with Allied's  electrical  conduit,  our steel  support  products and cable tray
products  will  greatly  enhance  our  value to  electrical  distributors.  This
acquisition,  which will be immediately accretive to earnings, will also enhance
our presence in the fast-growing do-it-yourself market."

         Ralph Pappito, Chairman and Chief Executive Officer of AFC Cable, said,
"This transaction  provides  exceptional value for shareholders of AFC Cable and
allows  our  shareholders  to  participate  in the  future  growth of Tyco.  Our
management team is very excited by the  opportunities  the combination with Tyco
presents for both companies and our customers."

         AFC Cable,  with annual revenues of  approximately  $275 million,  is a
leader in the design,  manufacturer and supply of prewired armor cable, flexible
conduit,  modular wiring systems and electrical fittings used in a wide range of
electrical, voice and data distribution products.

         Tyco  International  Ltd.,  a  diversified  manufacturing  and  service
company,  is the world's  largest  manufacturer  and servicer of electrical  and
electronic  components  and  undersea  telecommunications  systems,  the world's
largest  manufacturer,  installer,  and provider of fire protection  systems and
electronic  security  services,  has strong  leadership  positions in disposable
medical products,  plastics,  and adhesives,  and is the largest manufacturer of
flow control valves.  The Company  operates in more than 80 countries around the
world and has expected fiscal 2000 revenues in excess of $25 billion.


FORWARD LOOKING INFORMATION

         Comments in this release concerning the impact on earnings from the AFC
Cable   acquisition,   market  growth  and  expected  fiscal  2000  revenue  are
forward-looking   statements,   which  are  based  on  management's  good  faith
expectations  and belief  concerning  future  developments.  Actual  results may
materially differ from these expectations as a result of many factors,  relevant
examples  of which are set forth in the  "Management  Discussion  and  Analysis"
section of the Company's 1998 Annual Report to Shareholders,  the Company's 1998
Annual Report on Form 10-K,  and the Company's  Current Report on Form 8-K filed
on June 3, 1999

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