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EchoLife HG850
Service Manual

4 Use Guide

Issue 02 (2007-05-30)

Huawei Technologies Proprietary

4-1

Use Guide

About This Chapter

The following table lists the contents of this chapter.

Title

Description

4.1 Using a Telephone

Describes the use method after the HG850 is connected
with a telephone.

4.2 Using an STB

Describes the use method after the HG850 is connected
with an STB.

4.3 Using a PC

Describes the use method after the HG850 is connected
with a PC.

Summary of Contents for EchoLife HG850

Page 1: ...EchoLife HG850 GPON Terminal Service Manual HUAWEI TECHNOLOGIES CO LTD ...

Page 2: ...EchoLife HG850 GPON Terminal V100R001 Service Manual Issue 02 Date 2007 05 30 Part Number 31401177 Huawei Technologies Proprietary ...

Page 3: ... or transmitted in any form or by any means without prior written consent of Huawei Technologies Co Ltd Trademarks and Permissions and other Huawei trademarks are trademarks of Huawei Technologies Co Ltd All other trademarks and trade names mentioned in this document are the property of their respective holders Notice The information in this document is subject to change without notice Every effor...

Page 4: ... 4 2 3 1 Setting Up Configuration Environment 2 4 2 3 2 Configuring File Transfer Server 2 5 2 3 3 Loading File Through FTP 2 6 3 Service Configuration 3 1 3 1 Configuration Description 3 2 3 2 Basic Command 3 2 3 2 1 Command Structure 3 2 3 2 2 Command Modes 3 2 3 2 3 Online Help of Command Line 3 3 3 2 4 Common Commands 3 4 3 3 MGCP Service Configuration 3 4 3 3 1 MGCP Networking Method 3 4 3 3 ...

Page 5: ... 4 Configuring System Time A 2 A 1 5 Starting DNS Client A 2 A 1 6 Adding HG850 Network Management A 3 A 1 7 Saving Configuration Data A 3 A 2 Data Service Configuration A 3 A 2 1 Online Service A 3 A 2 2 Fax Service A 4 B SIP Service Configuration B 1 B 1 Voice Service Configuration B 1 B 1 1 Configuring IP Address B 1 B 1 2 Configuring SIP Server B 1 B 1 3 Configuring SIP User Information B 2 B ...

Page 6: ... the mounting holes at the bottom unit mm 2 2 Figure 2 2 Connection of the HG850 with devices 2 3 Figure 2 3 Networking for the remote Telnet maintenance through WAN 2 4 Figure 3 1 Relationships between the command modes 3 3 Figure 3 2 Service networking of the HG850 3 5 Figure 3 3 SIP networking 3 12 Figure A 1 Connection for the online service A 4 Figure A 2 Connection for the fax service A 4 Fi...

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Page 8: ... 2007 05 30 Tables Table 1 1 Indicators of the HG850 1 4 Table 1 2 Status of the Link indicator and the Auth indicator 1 5 Table 1 3 External interfaces of the HG850 1 6 Table 3 1 Common commands 3 4 Table 3 2 IP addresses to be planned 3 5 Table 3 3 IP addresses to be planned 3 6 ...

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Page 10: ...he following table lists the product versions related to this document Product Name Version EchoLife HG850 V100R001 Intended Audience This document is intended for z Technical support engineer z Maintenance engineer Organization This document consists of six chapters and is organized as follows Chapter Description 1 System Overview This chapter describes the basic information functions and feature...

Page 11: ...guration methods and procedures of the voice service and the data service of SIP C Fiber Installation This appendix describes how to install the fiber D Acronyms and Abbreviations This appendix lists acronyms and abbreviations in the manual Conventions Symbol Conventions The symbols that may be found in this document are defined as follows Symbol Description Indicates a hazard with a high level of...

Page 12: ...dface Italic Command arguments are in italics Items keywords or arguments in square brackets are optional x y Alternative items are grouped in braces and separated by vertical bars One is selected x y Optional alternative items are grouped in square brackets and separated by vertical bars One or none is selected x y Alternative items are grouped in braces and separated by vertical bars A minimum o...

Page 13: ...means the two keys should be pressed in turn Mouse Operation Action Description Click Select and release the primary mouse button without moving the pointer Double click Press the primary mouse button twice continuously and quickly without moving the pointer Drag Press and hold the primary mouse button and move the pointer to a certain position Update History Updates between document versions are ...

Page 14: ...ations and respect the legal rights of other people Environment Requirements z Place the device at a well ventilated place Do not expose the device to direct sunlight z Keep the device clean and free of dusts z Do not place any object on top of the device Otherwise the device may be too hot during operation It can even be deformed or damaged by the heavy load z Keep at least 10 cm between the devi...

Page 15: ... power supply and unplug the power plug immediately there is smoke emitted from the device or there is some abnormal noise or smell Contact the specified maintenance center for repair z Avoid any object such as metal shavings from entering the device from the heat dissipation intakes z Do not scratch or abrade the shell of the device This may lead to malfunctions of the device The shed painting ma...

Page 16: ...1 1 System Overview About This Chapter The following table lists the contents of this chapter Title Description 1 1 Product Introduction Describes the basic information functions and features of the HG850 1 2 Front Panel and Rear Panel Describes the front panel the rear panel and indicators of the HG850 ...

Page 17: ... Internet through its upstream optical interface The HG850 provides abundant interfaces at the local area network LAN side providing diversified networking possibilities In addition the HG850 offers high quality and cost effective voice over IP VoIP and fax over IP FoIP bringing superb voice and video services as well as high speed data services Using the ONT management and control interface OMCI ...

Page 18: ...igure 1 2 Networking diagram of the HG850 Softswitch VoIP HG850 Telephone TV STB BAS OLT Switch PC N2000 PSTN TG IPTV IP Internet Abbreviations Full Name BAS Broadband Access Server N2000 Huawei N2000 Network Management System OLT Optical Line Terminal PC Personal Computer PSTN Public Switched Telephone Network STB Set Top Box TG Trunk Gateway TV Television ...

Page 19: ...ows z Serves as a GPON terminal to realize bandwidth connection z Provides downstream rate up to 2 488 Gbit s and upstream rate up to 1 244 Gbit s z Provides four 100 Base TX full duplex Ethernet interfaces enabling all computers in the LAN to access the network efficiently z Provides two POTS interfaces These interfaces enable the device to provide the VoIP service z Supports the remote Telnet so...

Page 20: ...face is in the call status Tel1 Tel2 Telephone interface indicators Off The telephone interface is idle Table 1 2 describes status of the Link indicator and the Auth indicator Table 1 2 Status of the Link indicator and the Auth indicator Status Number Link Auth Description 1 Off Off Initial state 2 Slow blinking Off Standby state 3 Fast blinking Slow blinking Serial Number state 4 Fast blinking On...

Page 21: ...ON interface It is used to connect the HG850 with the upper layer device of the optical network Lan1 Lan4 Ethernet interfaces They are used to connect the network devices such as a computer an STB and a switch You can establish four Ethernet connections at the same time Tel1 Tel2 VoIP telephone interfaces They are used to connect the common telephone or the fax machine to provide the VoIP or FoIP ...

Page 22: ... This Chapter The following table lists the contents of this chapter Title Description 2 1 Installation Describes the installation method of the HG850 2 2 Getting Started with the HG850 Describes the cable connection method of the HG850 2 3 Software Loading Describes the software loading upgrade method and the procedure of the HG850 ...

Page 23: ...the wall There are two mounting holes at the bottom of the HG850 Figure 2 1 shows the dimensions of the mounting holes at the bottom Figure 2 1 Dimensions of the mounting holes at the bottom unit mm 190mm Ensure that the positioning screws on the wall are installed solidly 2 2 Getting Started with the HG850 Before connecting the HG850 turn off the power supply of devices such as your computer STB ...

Page 24: ...nd the fiber spool and reserve proper length of the fiber for leading it out from the cover hole that is the optical interface on the rear panel 5 Fix the cover properly 6 Install the rubber plug 7 Install the screws of the cover For details of installing the fiber see Chapter C Fiber Installation Step 2 Connect the fiber led from the optical interface of the cover to the optical interface on the ...

Page 25: ... lighting weather 2 3 Software Loading 2 3 1 Setting Up Configuration Environment Remote Maintenance The HG850 supports the remote Telnet maintenance Figure 2 3 shows the networking for the remote Telnet maintenance through WAN Figure 2 3 Networking for the remote Telnet maintenance through WAN 1 4 WAN 3 5 2 1 Remote maintenance terminal 2 Router 3 HG850 4 OLT 5 BAS The following table describes t...

Page 26: ...IP address of the maintenance terminal may be not the same as that of the HG850 Ensure that the two IP addresses can be pinged through by each other z When you are configuring the HG850 through the Telnet do not randomly change the IP address of the HG850 If it is necessary to change the IP address after the change the Telnet connection will be disconnected and you need log on again with the new I...

Page 27: ...name is admin the authentication password is admin the loading path is the default value the loading file name is upgrade bin The procedure is as follows Step Operation 1 Log in to the HG850 through the Telnet mode 2 Enter the privilege mode TERMINAL enable 3 Execute the load command TERMINAL load hg850 ftp 172 21 50 91 admin admin upgrade bin 4 Restart the system to validate the configuration TER...

Page 28: ...Title Description 3 1 Configuration Description Describes the software configuration of the HG850 3 2 Basic Command Describes the method and the procedure for setting up the environment of the HG850 3 3 MGCP Service Configuration Describes the configuration method and procedure for the HG850 MGCP service 3 4 SIP Service Configuration Describes the configuration method and procedure for the HG850 S...

Page 29: ...ster the usage of command lines which is a means to configure the device 3 2 1 Command Structure The command prompt consists of two parts fixed character string and command mode identifier z The command mode identifier indicates the mode in which the current command is For example indicates the user mode and indicates the privilege mode z In the privilege mode you can use the hostname method to co...

Page 30: ...n mode execute configure terminal To exit from the general configuration mode and enter the privilege mode execute exit 3 2 3 Online Help of Command Line The interface of command provides the following online helps Complete Help Enter in any view and then you can get all the commands usable under the view and the concise descriptions of the commands Partial Help z Enter after a command separated b...

Page 31: ... lever mode or exit the configuration environment exit any mode Save the settings TERMINAL write Set the hostname TERMINAL hostname Query the version TERMINAL display version Change the password TERMINAL config terminal user Set the system time TERMINAL time Set the region information TERMINAL config region CN HK BR EG GB CL SG US Set the timeout interval TERMINAL terminal timeout timeout length v...

Page 32: ...N PC telephone PC telephone Abbreviations Full Name DNS Domain Name Server WAN Wide Area Network Table 3 2 lists the IP addresses to be planned Table 3 2 IP addresses to be planned Item Parameter The IP address of the HG850 10 70 33 62 The IP address of the default upstream gateway of the HG850 10 70 33 60 The IP address of the MGC 210 11 180 18 The IP address of the DNS 210 11 123 13 The domain n...

Page 33: ...the PPPoE mode the IP address of the default gateway is automatically obtained The IP address of MGC In this guide the SoftSwitch is taken as an example of the MGC The IP address of DNS DNS is the domain name server The IP address of SNTP SNTP indicates the Simple Network Time Protocol server The IP address of Loghost Loghost is the host used for generating and storing logs NOTE DHCP Dynamic Host ...

Page 34: ...st be configured After being configured the IP address can take effect at once without rebooting The IP address of the HG850 can be obtained in three ways z Configuring a fixed IP address z Dynamically obtained from the DHCP server z Obtained through the PPPoE dialing mode z The HG850 can only configure one mode for the IP address z When you are dynamically obtaining the IP address such as through...

Page 35: ...AIN NAME2 0 0 0 0 2727 MG STATE REGISTERED MGC Fault 1 AUTH MODE KEY Huawei mode Configuring MGC Information In the general configuration mode configure the IP address or domain name of the HG850 The configuration command is as follows Command Remarks TERMINAL config mgcp mgc index address str Index The index of the SoftSwitch to which the gateway can register ranging from 1 to 2 Str It contains 1...

Page 36: ... 33 62 2427 huawei com MGC IP1 MGC PORT1 MGC DOMAIN NAME1 210 11 180 18 2727 MGC IP2 MGC PORT2 MGC DOMAIN NAME2 0 0 0 0 2727 MG STATE REGISTERED MGC Fault 1 AUTH MODE KEY Huawei mode Configuring MG Authentication Information To prevent the illegal MG from registering to the MGC start registration authentication on the MG The commands are as follows Operation Command Configure the authentication mo...

Page 37: ...the HW mode The registration key configured on the server is HG850register Step Operation 1 Configure the authentication mode to HW as well as the authentication key TERMINAL config mgcp authentication hw mode key Please input your keyword 1 16 characters Please input again 2 Query the configuration result TERMINAL config display mgcp attribute MGIP MG PORT MG DOMAIN NAME 191 168 208 13 2427 MGC I...

Page 38: ...recommended Configuring DNS After enabling the DNS client the HG850 can access other network devices by the domain name The relevant commands are as follows Operation Command Set the domain name of the DNS TERMINAL config dns domain name name Set the IP address of the DNS server TERMINAL config dns server first second third Example Start the DNS client on the HG850 Configure the domain name of the...

Page 39: ...Configuration 3 4 1 SIP Networking Method Figure 3 3 shows the SIP networking Figure 3 3 SIP networking WAN 2 3 4 1 3 1 Proxy server 2 Redirect server 3 SIP client user agent 4 Location Register server Figure 3 3 describes functions of the devices in the networking of the HG850 Name Description Proxy server Forwards the requests or responses of clients Redirect server Maps the addresses in users c...

Page 40: ... name name Log out the SIP user TERMINAL config undo sip shutdown user sn all Configure the SIP user digitmap TERMINAL config sip digitmap digitmap Configure the SIP local port number TERMINAL config sip local port localport Display the SIP user attribute TERMINAL config display sip attribute Display the SIP digitmap TERMINAL config display sip digitmap Display the SIP send capability TERMINAL con...

Page 41: ...ed in three ways z By Configuring a fixed IP address z From DHCP server z Through the PPPoE dialing mode For the SIP HG850 DHCP is the default method of obtaining the IP address Configuring SIP Server In the general configuration mode configure the information of the call server which SIP HG850 registers to The configuration command is listed as follows Command Remarks TERMINAL config sip server i...

Page 42: ...e SIP user including user telephone number call authentication password and user alias In the general configuration mode the command is listed as follows Command Remarks TERMINAL config sip user user sn id id password password name name user sn The port number of the connected HG850 Its range varies according to the actual port quantity of the devices in use For example the HG850 has two ports The...

Page 43: ...ERMINAL config 2 Query the configuration result TERMINAL config display sip attribute 0 Sip User Information user sn 0 id 88889999 password name jack local address 172 21 100 29 local port 5060 registration state registered previous server 0 0 0 0 5060 current server 191 168 100 8 5060 In the general configuration mode execute undo sip user to delete the SIP user execute sip shutdown to enable the...

Page 44: ... digitmap to cancel user digitmap z Execute display sip digitmap to view user digitmap information Example Delete the default digitmap the configured digitmap string is 0755xxxxxxxx Only the number starting with 0755 is permitted to be dialed Step Operation 1 Delete the default SIP digitmap ERMINAL config display sip digitmap Sip digitmap index digitmap 0 XABCD T TERMINAL config undo sip digitmap ...

Page 45: ...d to configure the local port number which is used by HG850 to send the SIP signaling The default SIP signaling port number is 5060 It can be modified through the following command Command Remarks TERMINAL config sip local port port local port Local port number The value cannot be the same with other port numbers The default is 5060 Example Configure the local port number as 5061 Step Operation 1 ...

Page 46: ...on user sn 0 id 88889999 password name jack local address 172 21 100 29 local port 5061 registration state registering expire time 0 sec previous server 0 0 0 0 5060 current server 191 168 3 3 5061 TERMINAL config After the MGCP or SIP configuration completes connect the HG850 with a telephone according to Getting Started with the HG850 and then pick up the telephone If you hear a beep the configu...

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Page 48: ...r The following table lists the contents of this chapter Title Description 4 1 Using a Telephone Describes the use method after the HG850 is connected with a telephone 4 2 Using an STB Describes the use method after the HG850 is connected with an STB 4 3 Using a PC Describes the use method after the HG850 is connected with a PC ...

Page 49: ...o section 3 Service Configuration Step 4 Enjoy the high speed voice service Pick up the telephone Enter the number that you want to dial Wait for an answer End 4 2 Using an STB Step 1 Connect the HG850 Refer to section 2 2 Getting Started with the HG850 to connect an STB Ensure that the STB and the HG850 are correctly connected Step 2 Power on the HG850 the TV and the STB Three modes are available...

Page 50: ... IP addresses of the PC Three modes are available z Preset a fixed IP address z Obtain an IP address from a DHCP server z Obtain an IP address through the PPPoE dialing mode Contact your service provider for which mode to use Step 4 Enjoy the high speed data service Enable the Internet Explorer to surf on the Internet End z The PC must have an Ethernet card z The operating parameters of the HG850 ...

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Page 52: ...e downstream optical signal sent by the service provider Contact service provider for help The Tel indicator is off z Check whether the telephone cable provided with the device is used z Check whether the connection of the telephone cable is correct z Check whether the telephone is hung up The Lan indicator is on z Check whether the provided Ethernet cable is used z Check whether the Ethernet cabl...

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Page 54: ... interfaces RJ 11 z One Power interface Protocols and Standards z GPON ITU T G 983 3 and ITU T G 984 x z FE IEEE802 1p IEEE 802 3u and IEEE802 1q z VoIP G 711A u and T38 standard MGCP RTP RTCP SIP protocol Physical Specifications z Dimensions L W H 275 mm 205 mm 46 mm z Weight 765 g z Power adapter input 100 240 V AC 50 60 Hz z Whole device power supply 12 V DC 2 A z Standard power consumption 12 ...

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Page 56: ...NAL config ipaddress static 10 70 33 62 255 255 0 0 10 70 33 60 Changing net parameter may affect current se DNS Domain Name my domain Physical Address IP Address Get Method Static IP config esw unit number 3 Flags 0x68243 UP BROADCAST MULTICAST ARP IP Address 10 70 33 62 Subnet Mask 255 255 0 0 Default Gateway esw unit number 4 Flags 0x68243 UP BROADCAST MULTICAST ARP R IP Address 192 168 100 1 S...

Page 57: ...0 0 2727 MG STATE REGIS Fault 1 AUTH MOD Huawei m The HG850 supports dual homing You can configure two MGC servers for the HG850 When the HG850 fails to register to the first MGC it registers to the second MGC 1 indicates the first IP address of the MGC while 2 indicates the A 1 4 C 55 00 2006 10 20 A 1 5 S n eters of the DNS RMINAL config dns server 210 11 123 13 second IP address of the MGC onfi...

Page 58: ...A 1 shows the connection for the online service TERMINAL confi user config DNS suffix tele com Main DNS Server Secondary DNS Serve config protocol get DNS suffix my domain Secondary DNS Server dding HG850 Network Management Configure the IP address of the nms pri HG850 network managem TERMINAL c cr secondary K Command nms primary primary IP 210 11 123 33 config succeed Configure the HG850 to regis...

Page 59: ...on the wall 2 HG850 3 PC 4 Switch A 2 2 Fax Service By default the HG850 supports the fax service You need to select the fax mode In the general configuration mode use display mgcp soft parameter to check the fax mode It is t38 by default Figure A 2 shows the connection for the fax service Figure A 2 Connection for the fax service 3 1 2 1 Optical interface on the wall 2 HG850 3 Fax machine ...

Page 60: ...EchoLife HG850 Service Manual A MGCP Service Configuration Issue 02 2007 05 30 Huawei Technologies Proprietary A 5 If you want to change the fax mode contact the service provider for help ...

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Page 62: ...lay ipaddre The information is displayed as follows m DNS Domain Name abc co 00 e0 fc 92 Physical Address IP Address Get Method DHCP esw unit number 3 Flags 0x68243 UP BROADCAST MULTICAST ARP IP Address 191 168 100 2 Subnet Mask 255 255 0 0 8 10 10 Default Gateway 191 16 DHCP Server Address 191 168 210 DHCP Expired Time Leng esw unit number 4 Flags 0x68243 UP BROADCAST MULTICAST ARP R IP Address 1...

Page 63: ...P user p user 0 id 88880008 password 88880008 cr name K on will affect the user s current services Continue n of command succeeded SIP servers here can be configured from 0 to 2 It is recommended to configure the address of Server 0 as that of the main server and the IP address o B 1 3 Configuring SIP User Information Configure the follow z Port number 0 z ID 88880008 z Authentication password 888...

Page 64: ...config TERMINAL write Command executing please wait System starts to save configuration data please The configuration d TERMINAL Currently the SIP HG850 only supports the basic voice service For added valued services for example three party service conference call video confere transfer caller identification disp nce call lay and advice of charge at the end of conversation are not supported addres...

Page 65: ...e B 1 Connection for the online service 1 2 3 4 3 1 Optical interface on the wall 2 HG850 3 PC 4 Modem B 2 2 Fax Service By default the HG850 supports the fax service Figure B 2 shows the connection for the fax service Figure B 2 Connection for the fax service 3 1 2 1 Optical interface on the wall 2 HG850 3 Fax machine ...

Page 66: ...EchoLife HG850 Service Manual B SIP Service Configuration Issue 02 2007 05 30 Huawei Technologies Proprietary B 5 If you want to change the fax mode contact your service provider for help ...

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Page 68: ...C Fiber Installation Issue 02 2007 05 30 Huawei Technologies Proprietary C 1 C Fiber Installation The installation steps are shown as follows Step 1 Remove the two screws form the cover with a cross screwdriver Step 2 Open the cover ...

Page 69: ... Proprietary Issue 02 2007 05 30 To avoid damaging the cover carefully perform the operation with both hands After opening the cover you can see two layers in the following figure of feet around the fiber spool as shown Insert one end of the fiber to the fiber adapter Step 3 ...

Page 70: ...followi principles z The number of the winding circles is subject to the length of th longer the used fiber is the more the winding circles are z Except the first circle is wound as the shape wind the othe shape Step 4 ng winding e fiber you use The r circles as the z The first and second circles are wound at the bottom layer the feet z The third and fourth circles are wound between the two layers...

Page 71: ...C Fiber Installation EchoLife HG850 Service Manual C 4 Huawei Technologies Proprietary Issue 02 2007 05 30 ...

Page 72: ...EchoLife HG850 Service Manual C Fiber Installation Issue 02 2007 05 30 Huawei Technologies Proprietary C 5 ...

Page 73: ...EchoLife HG850 Service Manual C 6 Huawei Technologies Proprietary Issue 02 2007 05 30 Reserve proper length of the fiber for leading it out from the hole Step 5 er which the optical interface on the rear panel on the cov is ...

Page 74: ...EchoLife HG850 Service Manual C Fiber Installation Issue 02 2007 05 30 Huawei Technologies Proprietary C 7 Step 6 ix the cover properly and install the rubber plug F ...

Page 75: ...C Fiber Installation EchoLife HG850 Service Manual C 8 Huawei Technologies Proprietary Issue 02 2007 05 30 Step 7 stall the screws of the cover In ...

Page 76: ...EchoLife HG850 Service Manual C Fiber Installation Issue 02 2007 05 30 Huawei Technologies Proprietary C 9 End After the fiber is installed refer the following figure ...

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Page 78: ...ration Protocol NS omain Name Server TP ile Transfer Protocol PON igabit Capable Passive Optical Network PTV ternet Protocol Television AN ocal Area Network GCP edia Gateway Control Protocol T etwork Address Translation B D DHCP Dynamic Host Configu D D F FoIP Fax over IP F F G G G I IP Internet Protocol I In L L L M MG Media Gateway MGC Media Gateway Controller M M N NA N ...

Page 79: ...ver Ethernet nd Home Office TB et Top Box ay V elevision A ser Agent oIP oice over IP WAN Wide Area Network O OLT Optical Line Terminal OMCI ONT Management and Con O O P PC Personal Computer PON Passive Optical Network POTS Plain Old Telephone Service PSTN Public Switched Telephone Network P P S SIP Session Initiation Protocol SOHO Small Office a S S T TG Trunk Gatew T T U U U V V V W ...

Page 80: ... MG Authentication Information 3 9 MGC Information 3 8 Signaling Port Number of MG 3 10 Signaling Port Number of MGC 3 11 Configuring SIP 3 14 IP Address of the HG850 3 14 Signaling Port Number of SIP 3 18 SIP Server 3 14 SIP User 3 15 SIP User Digitmap 3 17 G GPON 1 2 L Loading File Through FTP 2 6 M MGCP 3 2 O OLT 1 4 OMCI 1 2 S SIP 3 2 T Technical Specifications 6 1 Troubleshooting 5 1 i ...

Page 81: ...HUAWEI TECHNOLOGIES CO LTD Huawei Industrial Base Bantian Longgang Shenzhen 518129 People s Republic of China www huawei com Part Number 31401177 ...

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