Mr. plummer said he knew of only one incident in which huawei equipment performed erratically .
普卢默说,他只知道一例华为设备工作异常的情况。
Mr. plummer said the report lacked evidence of illegal activity or threats to u.s. security .
普卢默说,报告中并没有有关华为存在非法活动或危及美国安全的证据。
William plummer , huawei 's external relations chief , said his company 's equipment has been used by 45 of 50 top telecommunications service providers around the world , without any security incidents .