central office switches
... 公司的局端 Central Office 局端交换机 Central Office Switches 局端分离器 ADSL SPLITTER ...
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发端端局交换机 Originating Local Exchange
目的地端局交换机 destination local exchange
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ZXA10 T600一般放在局端交换机房内，是接入网的核心部分，内部模块如下图所示。
The ZXA10 T600 is generally located in the equipment room at the office end, functioning as the core of the AN. Its internal modules are shown below.
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