For the economic planning of an alternate routing network the number of circuits in a high-usage group should be determined so that the annual charges for the whole network arrangement are at a minimum. This is done under the constraint that given requirements for the grade of service are fulfilled. In the optimum arrangement, the cost per erlang of carrying a marginal amount of traffic over the high-usage route or over the alternative route is the same.
ITU-T E.522-1993由国际电信联盟 IX-ITU 发布于 1993-01-01。
ITU-T E.522-1993 在中国标准分类中归属于: M30 通信设备综合。
* 在 ITU-T E.522-1993 发布之后有更新,请注意新发布标准的变化。
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