城市ＣＡＴＶ网升级改造方案探讨王熙，姜兵，张英琛（济南有线电视台）编者按有线电视系统的升级改造是当前有线电视工程中一个十分重要的课题。由于客观上存在着地域、经济、城乡、进网户数等许多差异，使得“升级改造”不可能按一个模式进行。那么，结合本地实际，选用... Upgrading of urban CATV network solutions Wang Xi, Jiang Bing, Zhang Yingchen (Jinan Cable TV) Editor According to the upgrading of cable television system is the current cable television project is a very important issue. Due to the objective existence of many differences such as geography, economy, urban and rural areas, and the number of households entering the network, it is impossible for “upgrading” to be conducted in a single mode. Well, combined with local reality, choose ...