Huawei MC509 Hardware Manual page 41

HUAWEI MC509 CDMA Mini PCIe Module
Hardware Guide
Boards and IC chips must not be stacked randomly or be placed with other ESD

components.
Effective shielding measures must be taken on the ESD sensitive materials that

are transported or stored outside the EPA.
HUAWEI MC509 Mini PCIe module does not include any protection against overvoltage.
Issue 03 (2014-12-26)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
Electrical and Reliability Features
41