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答要接入DDN业务,在ZXA10中最简单的方式就是利用84Mbit/s等光传输设备为用户提供2Mbit/s的DDN专线:可直接从光线路终端(0LT)及光网络单元(0NU)的电端机的2Mbit/s口上引出,为DDN节点机间
Answer: To access DDN service, the easiest way in ZXA10 is to provide users with 2Mbit / s DDN leased lines by using optical transmission equipment such as 84Mbit / s: it can directly connect with optical line terminal (OLT) and optical network unit Electric terminal 2Mbit / s port leads to DDN node machine room