WATERPROOF PLASTIC INSULATED MULTIPAIR TELEPHONE CABLE

reportActive / Technical Report | Accession Number: AD0678994 | Open PDF

Abstract:

A waterproof plastic insulated multipair cable for long, buried, rural telephone subscriber routes is now under development. These routes employ cables having small pair counts and coarse gauge size typically 25 pairs or fewer, 19 and 22 gauge. The sheaths of these cables are susceptible to lightning and physical damage with subsequent transmission degradation high, unstable loss, noise, and possible corrosion due to the entrance of water into the cable core, which has a large percentage of air space. In the design under development this air space is filled with a dielectric compound, consisting of polyethylene and petroleum jelly, which prevents liquid water ingress and thus stabilizes the transmission parameters. Capacitance stability on the order of 1 or less has been achieved on experimental samples immersed in water for many weeks.

Author(s):
Biskeborn, M. C. ; Dobbin, D. P.
Author Organization(s):
BELL TELEPHONE LABS INC MURRAY HILL NJ
Supplementary Note:
Prepared for presentation at Annual Wire and Cable Symposium (17th), Atlantic City, N. J. 4 Dec 1968.
Pagination:
0025

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release
Distribution Statement:
Approved For Public Release; Distribution Is Unlimited.

RECORD

Collection: TR
Subject Terms
Joint Capability Areas:
JCA_4.6.1_General Engineering; JCA_4.6_Engineering; JCA_5_Command and Control; JCA_4.3_Maintain; JCA_5.3_Planning
Modernization Areas:
Microelectronics
Communities of Interest:
No COI(s) Identified
Descriptor(s):
*TELEPHONE LINES, MIXTURES, PROPENES, ALUMINUM, SHIELDING, GREASES, DIELECTRICS, FILLING, ELECTRIC CABLES, POLYETHYLENE PLASTICS, PLASTIC COATINGS, MOISTUREPROOFING, ELECTRICAL INSULATION
Field(s)/Group(s):
Electrical and Electronic Equipment, Non-Radio Communications
Report Date:
1968 Dec 01