N2000H V3 Appliance 
User Guide 
 
Huawei Proprietary and Confidential                                     
Copyright © Huawei Technologies Co., Ltd. 
 
A How to Obtain Help 
If a tough or critical problem persists in routine maintenance or troubleshooting, contact 
Huawei for technical support.   
A.1    Preparations For Contacting Huawei 
To better solve the problem, you need to collect troubleshooting information and make 
debugging preparations before contacting Huawei. 
A.2    How to Use the Document 
Huawei provides guide documents shipped with the device. The guide documents can be used 
to handle the common problems occurring in daily maintenance or troubleshooting. 
A.3    How to Obtain Help from Website 
Huawei provides users with timely and efficient technical support through the regional offices, 
secondary technical support system, telephone technical support, remote technical support, 
and onsite technical support. 
A.4    Ways to Contact Huawei 
Huawei Technologies Co., Ltd. provides customers with comprehensive technical support and 
service. For any assistance, contact our local office or company headquarters. 
A.1  Preparations For Contacting Huawei 
To better solve the problem, you need to collect troubleshooting information and make 
debugging preparations before contacting Huawei. 
A.1.1  Collecting Troubleshooting Information 
You need to collect troubleshooting information before troubleshoot. 
You need to collect the following information: 
 
Name and address of the customer 
 
Contact person and telephone number 
 
Time when the fault occurred 
 
Description of the fault phenomena 
 
Device type and software version 
 
Measures taken after the fault occurs and the related results 
 
Troubleshooting level and required solution deadline