This paper presents the application and main electric properties of category 7 digital communications cables,focusing on the technological design and key technology control during the production of these cables,in a view to improve further the product quality.

Based on the data aquired in the industry investigation the market prospect for telephone cable is predicted, also the development status of digital communication cable is overviewed.

Design and manufacture of category 6~+ shielded data cable;

Based on the analysis of the principle of the testing system of the large pair count digital communications cables,the testing system is explained in detail in the following four aspects,i.

This paper presents the construction and raw materials of the CMP flame retardant symmetrical cables for digital communications complying with the US standard UL 910:1998.