Tham khảo tài liệu 'white paper - icdc - copper cable conductors analysis - impact analysis of conductor gauge on tel', công nghệ thông tin, quản trị mạng phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | The copper conductors in telephone cables are pre-dominantly of gauge. However gauge copper conductor has been introduced in the recent years. This gauge conductor is being increasingly used to provide telephone connections. The main motivation for using this conductor gauge is the apparent saving in the cost of the copper cable subscriber's loop. However, apart from this apparent saving, the capability of this gauge of conductor to enable provision various telecom services made possible by technology requires to be examined in depth, as this would be of paramount importance to the Telecom Circles. The main thrust of this document is to show that it is disadvantageous using mm gauge conductor in place of gauge conductor in provision various value added telecom SW:Vices. This document shows that on the one hand there is no real saving due to use of mm gauge, while on the other hand this lower gauge has a very significant adverse impact on the provision of telecom services. BACK GROUND Copper conductor telephone cables have been used in the local loop for the past several decades. Currently copper conductor, polyethylene insulated and sheathed, unit twin jelly filled cables both armoured and unarmoured are deployed for this purpose. These cables are used in every telecommunication circle. The value of this cable network is estimated at over crores ( billion). These cables are presently being used for transmission of analogue voice and slow speed data from the local telephone exchange to the telephone instrument at the user premises. This sector is called the "Subscriber Access Network (SAN)" and is a critical sector of the telecommunication network. Currently it provides almost 27 million telephone connections throughout the country (as on 31-03-2000). Keeping in view the vast investments made, the decades taken to build the copper cable network, its extensive penetration in the system, availability of trained manpower .
