配线架和光线配线架是一个东西么?不是的话有什么区别?请说的具体点!

每个用户需要一个网络接点和一个电话接点,每个电话接点需要1对大对数线缆,比如50对大对数可以支持50个语音用户,如果有超过50个,不足100个,就用两根50对大对数线缆.配线架每个接点用一个配线架端口,一般都是24口的配线架,所以每增加24个接点就要用1个配线架.

1U差不多就是4CM,
机柜中的设备一般用U来做单位
一般的设备都是1U的,比如24口配线架,理线架,一般的交换机（交换机也有2U或者更高的）
所以答案：
1U最多放一个24口配线架.
42U机柜最多能放的的 配线架+交换机=42 （不过不会有人这么做的,因为配线架太多必然需要理线架,理线架也是1U的,否则线路凌乱,无法管理的,另外为了保证扩容性,在初次规划时必须预留至少30%的空间,也就是必须留出12U的空间出来.大型密集网络机柜里面一般是8个交换机+12个配线架+12个理线架,理线架比交换机多是因为工程规划的网络接口需求一般比实际需求多,也就是12个配线架可能实际只需要8个交换机就可以满足了）

不考虑冗余：根据你的信息点（数据点和语音点）位来计算的,在不考虑冗余的情况下二者的关系是【配线架数量*24≥实际信息点】,假如说某楼层的数据点是100个,语音点是40个,那就用100除以24进位取整数,数据配线架就要5个；语音点同理,40除以24,语音配线架需要2个.
考虑冗余：基本原理没有变化,但是【配线架的数量*24≥实际信息点*（1+冗余百分比）】

Because company's telephone program controlled switch is older and the telephone engine room 配线架 and the correlation hardware equipment compares old,at present the company 40 insides connection telephones completely have been at the saturated condition,if has the new staff to input needs the inside connection telephone the speech,has been unable to increase the new extension telephone number again,based on the present situation,now does not increase the cost investment in the foundation to use digital relaying which the net passes to turn on the plan (to see contract) to promote the company the telephone engine room equipment and the connection quality and the increase company extension telephone quantity.At present the telecommunication has 6 relaying lines (temporarily to maintain invariablely),makes the telephone after the net to move for 3 months not to have the breakdown,may reduce the telecommunication relaying line is 2-3.At present the company telecommunication straight line telephone all maintains invariablely.Presently uses 2 digital relaying line,60 telephone channels,100 serial numbers (230,231 each 40,232 reserve 20)

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