Correct you are! Having spent 7 years of my career doing large OSP (OSP in this case is Outside Plant) installations around the country including direct buried, ducted and aerial I can confirm that these techniques are routinely employed. That makes 2 cable weenies! -S -----Original Message----- From: Jay R. Ashworth [SMTP:jra@scfn.thpl.lib.fl.us] Sent: Friday, July 18, 1997 2:38 PM To: Owen DeLong Cc: Dave O'Shea; stephen@clark.net; nanog@merit.edu Subject: Re: DC fiber cut: field report On Fri, Jul 18, 1997 at 11:59:11AM -0700, Owen DeLong wrote:

Gee, makes a good case for putting innerduct inside conduit and putting gas through it just to discourage BIFF. :-)

Am I the only one who's a cables and switches weenie enough to know that the telco's _already do this_? Large numbers of local multi-pair trunking cables are pressurized with nitrogen, and they put pressure drop alarms on them, so they know if one takes a hit. Cheers, -- jra -- Jay R. Ashworth jra@bayli nk.com Member of the Technical Staff Unsolicited Commercial Emailers Sued The Suncoast Freenet "People propose, science studies, technology Tampa Bay, Florida conforms." -- Dr. Don Norman +1 813 790 7592