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From: zygot!john@apple.com (John Higdon)
Newsgroups: comp.dcom.telecom
Subject: Re: Tanks near Telephone Poles
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Date: 8 Aug 89 16:17:49 GMT
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X-TELECOM-Digest: volume 9, issue 285, message 11 of 11

In article , claris!apple!netcom!
wasilko (Jeff Wasilko) writes:
> I've seen compressed gas cylynders near poles and I've always wondered what
> purpose they are used for? Could anyone shed some light on this?

These tanks are filled with nitrogen. By using positive pressure
withing the cable housing, moisture is kept out and sudden loss of
pressure could indicate cable damage or failure.

BOCs generally pressurize from central points; GTE and other
independents use those tanks that you have noticed.
--
        John Higdon         |   P. O. Box 7648   |   +1 408 723 1395
      john@zygot.uucp       | San Jose, CA 95150 |       M o o !