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Dados Huawei MT880
ADSL technology provides the last mile access for subscribers over ordinary telephone lines. In the past years, ADSL has become one of the most cost-effective access methods in the market. However, as the number of ADSL subscriber increases, some deficiencies of present ADSL have shown up, such as poor adaptability, small coverage, large power, insufficient VF bandwidth and absence of line test functions. To address these problems, ITU-T has launched G.992.5 (ADSL2+) as new standards for ADSL services.
The SmartAX MT880 ADSL2+ CPE of Huawei (referred to as the MT880 hereinafter) complies with the new ADSL standards. The MT880 supports asymmetrical transmission rates of up to 26 Mbps downstream and 1 Mbps upstream, and ensures high-quality access service together with its stable performance.
The MT880, branded as SmartAX, provides a single Ethernet interface for user access. It can be suitably applied in family entertainment or SOHO over Internet.
Figure 1 MT880 appearance
I. High Speed
l Max. downstream rate of 26 Mbps and upstream rate of 1 Mbps
l Max. transmission distance of 6.5 kilometers
II. Strong Maintainability
l Provides abundant line test and fault diagnose functions
l Provides five LEDs to indicate statuses of the device
l Web-based management interface for easy operation
III. Strong Adaptability
l Good interoperability with DSLAM devices of different vendors
l Strong anti-noise and spectrum-compatibility
l Provides up to eight PVCs
l Supports internal PPPoE dialer
IV. Ease of Use
l Plug-and-play
l Compact and elegant design with various mounting modes (horizontal, vertical and wall mount)
V. High Security
l Password protection on management interface
l PAP/CHAP authentication schemes
l DHCP server, NAT, IP Filter, firewall and protocol block
VI. Good Manageability
l Web-based configuration, management and firmware upgrading
l Remote management over Telnet session
l Supports SNMP V1/V2
VII. Low Power Consumption
l Supports L3 sleep mode
l Supports L2 low-power mode
I. Data Transmission Rate
l ITU-T G.992.5 (ADSL2+): downstream rate of 26 Mbps, and upstream rate of 1 Mbps
l ITU-T G.992.5 Annex L: Max. transmission distance of 6.5 kilometers
II. Physical Specifications
l Power output: 9V AC 1A
l Max. power consumption: <9W
l Operating temperature: 0°C~40°C (32°F~104°F)
l Relative humidity: 5~95% (non-condensing)
l Dimensions: 135mm x 110mm x 28mm
l Weight: 180g
III. Interface Specifications
l One RJ-11 interface, which connects to the ADSL line.
l One 10/100 Base-T RJ-45 interface for connection with the PC and the LAN
l One 9V AC power input
The interfaces are shown in the figure below.
Figure 2 Interfaces on the MT880 rear side
IV. LED Types
The figure below shows the LEDs of the MT880.
Figure 3 MT880 LEDs
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LEDs
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Indication
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Power
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A green LED that lights up when the CPE is powered on
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ADSL: LINK
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A green LED that blinks quickly when the ADSL link is being activated.
After the ADSL link has been activated, the LED lights up steadily.
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ADSL: ACT
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Blinking when there is traffic over the ADSL link.
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LAN: LINK
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Both steady green and orange light indicate a valid LAN connection. Green light indicates that the data rate is 10 Mbps; while orange light indicates that the data rate is 100 Mbps.
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LAN: ACT
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Blinking when there is traffic over the Ethernet link.
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I. Standards
l ITU G.994.1 (G.hs)
l ITU G.992.5
l ITU G.992.5 Annex L
l IEEE802.3, IEEEE802.3u 10/100 Base-T Fast Ethernet
II. WAN Protocols
l Multiprotocol Encapsulation over ATM Adaptation Layer 5 (RFC 1483), supports LLC encapsulation or VCMUX encapsulation
l Classical IP and ARP over ATM (RFC 1577), supports LLC encapsulation or VCMUX encapsulation
l PPP over ATM (RFC 2364), supports LLC encapsulation or VCMUX encapsulation
l PPP over Ethernet (RFC 2616), supports LLC encapsulation or VCMUX encapsulation
l IP V4, TCP/UDP, ARP, RARP, ICMP, DNS, DHCP and NAT
l RFC 1334 (PAP) and RFC 1994 (CHAP)
l IEEE802.1d Spanning-tree Bridge
l RIP v1 (RFC 1058) and RIP v2 (RFC 1389)
III. Configuration and Management
l HTTP Server: supports Web interface configuration
l Telnet: supports establish of Telnet session on LAN port
l TFTP: supports upgrading of program
l SNMP V1 and V2
I. High Speed
The MT880 is in full compliance with ADSL2+: ITU G.992.5. The spectral range of the MT880 is 2.2MHz, and its maximum number of sub-carriers is 512. The maximum downstream rate is 26 Mbps, and the maximum upstream rate is 1 Mbps, enabling a broader range of applications.
With its support on ADSL2+, the MT880 provides a maximum access distance of 6.5 Km.
II. Strong Maintainability
The MT880 provides abundant line test/diagnose functions, supporting single end loop test and dual end loop test. By cooperating with the DSLAM device on the CO end, the MT880 is able to collect and report, in and after the initialization process, key parameters including line noise, line attenuation, SNR margin and maximum available rate. The line test and fault diagnose functions of the MT880 provide strong support to the service providers in respect of maintenance operation and fault-finding.
The five LEDs on the MT880 help to monitor the connection status or even to locate the faults. The Web-based configuration interface helps you to master the management and configuration methods easily.
The MT880 supports OAM end-to-end loopback test to detect the connectivity of ATM links.
III. Strong Adaptability
The MT880 adopts seamless rate adaptation, prohibition of sub-channels, fast bit-switching and dynamic rate allocation to achieve outstanding ability in rate auto-adaptation. The MT880 has excellent anti-noise ability to ensure reliable services.
IV. Ease of Use
The MT880 has very strong adaptability to different network conditions. The factory-configuration of PVC complies with most of the bridged application scenarios.
The MT880 also features elegant outlook and flexible mounting modes. Its well-designed housing and base structure allows the MT880 to be mounted horizontally, vertically or to the wall, making it more applicable for household use.
V. High Security
The MT880 employs multiple security technologies, including:
l Firewall
The firewall protects local network and executes deny of service to prevent the following attacks:
² IP Spoofing
² Tear Drop
² Smurf and Fraggle
² Land Attack
² Ping of Death
l IP Filter
The MT880 IP filter function allows you to create rules for controlling data input and output between the LAN and the Internet, and inside the LAN, in order to implement security protection and internal management of LAN. By configuring the IP filter function, you are able to keep away the known threats in advance
The MT880 provides powerful IP filter function on the transmission direction, source IP address and port number, destination IP address and port number, protocol type (ICMP or TCP), packet size and slice. In terms of protocol type filtering, specific packets of the protocol, like ICMP ECHO/REPLY and TCP SYN, can be filtered.
The MT880 also supports monitor on potential attacks by configuring a blacklist. It allows multiple administrator mailboxes so that the log targets can be informed in time when there is an attack
l Protocol Block
The protocol block function of the MT880 prevents the ADSL terminals from forwarding data of a specific protocol. This function is used to discard data packets of an undesired protocol in a network. By configuring the protocol block function, you are able to control the type of packets to be transferred over the LAN, in order to avoid security risks and reduce unnecessary burden of the network.
The MT880 is able to block these types of protocols: PPPoE, IP Multicast, RARP, 802.1Q, IPX, AppleTalk, NetBEUI, BPDU and IPv6 Multicast.
VI. Good Manageability
The MT880 supports these management methods:
l Web-based management interface
l Remote management over Telnet session
l Centralized management based on SNMP V1/V2
VII. Low Power Consumption
The MT880 supports L3 sleep mode. In normal operation, the MT880 works at full capacity. But when the subscriber is not on the line, the MT880 and corresponding subscriber module in the central office will both enter the sleep mode.
The MT880 supports L2 low-power mode. When the traffic is small, the MT880 is able to reduce the transmitting capacity to save the power, and thus reduce crosstalk on the line.
The two modes above provided by the MT880 can effectively save the power consumption meanwhile reduce the heat radiation of the device in the central office.
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ADSL
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Asymmetric Digital Subscriber Line
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ATM
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Asynchronous Transfer Mode
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BPDU
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Bridge Protocol Data Unit
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CPE
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Customer Premises Equipment
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DHCP
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Dynamic Host Configuration Protocol
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DNS
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Domain Name Server
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DSLAM
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Digital Subscriber Line Access Multiplex
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IP
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Internet Protocols
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ICMP
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Internet Control Message Protocol
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IPoA
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Internet Protocols Over ATM
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LAN
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Local Area Network
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NetBEUI
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NetBIOS Extended User Interface
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PPP
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Point to Point Protocol
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PPPoA
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PPP over ATM
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PPPoE
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PPP over Ethernet
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PVC
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Permanent Virtual Connection
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RARP
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Reverse Address Resolution Protocol
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RIP
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Routing Information Protocol
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SNMP
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Simple Network Management Protocol
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TCP
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Transfer Control Protocol
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TFTP
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Trivial File Transfer Protocol
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UDP
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User Datagram Protocol
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USB
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Universal Serial Bus
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VCI
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Virtual Channel Identifier
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VPI
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Virtual Path Identifier
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