Generic Cabling for Broadband Access Networks Using Application Independent Universal Cables

摘要

At present the market requires reliable access cable networks which are able to transmit actual broadband systems on the one hand and to take over the coming transmission technologies in the near future on the other hand. Thus a new high grade cable design containing a sufficient headroom is necessary to be introduced. Typically the first part of the access network consists of outdoor cables and the second part of the total transmission link however is normally executed with indoor cables which have to be flame retardant in case of fire and have to avoid undesired smoke release. The challenge now is to introduce only one cable construction which is able to serve for both outdoor and indoor installations. The described cable concept meets this general requirement concerning installation of a new defined universal cabling concept. At the same time the electrical quality of this cable construction offers the ability to take over the current available transmission systems and to incorporate arising new transmission techniques of the near future. In order to ensure highest broadband channel behavior for certain cases in the course of time optical fibre elements can be incorporated into the copper cable core and appropriate jointing technologies for both copper and fibre are proposed. This introduced universal cable generation defines a highly advisable generic cabling for access links in city networks. It fulfills important criteria respecting mechanical and electrical behavior. Thus this cable concept constitutes an investment safe technology which avoids repeated cost intensive plant installations. Relating the clear trend towards high grade digital transmission systems focus has also been taken upon the transmission behavior of the copper transmission circuits for xDSL-systems. Transmission parameters like attenuation, crosstalk attenuation, longitudinal conversion loss, return loss, characteristic impedance will be examined.