<strong>Installation</strong> <strong>Manual</strong><strong>Quidway</strong> <strong>AR</strong> <strong>28</strong> <strong>Series</strong> <strong>Routers</strong>Chapter 1 Overviewcircuit interface and fiber interface), ADSL interface, ATM interface, and so on. Theuser can change or extend SICs or MIMs as needed. Thereby, the investment that hasbeen made can be protected to the maximum degree.III. Supporting multiple channels <strong>of</strong> asynchronous serial interface access• Connected to PSTN (Public Switched Telephone Network) via the asynchronousserial interface, the router can work as a small Internet access server.• With an analog Modem interface card (options: SIC-1AM/2AM and 6AM/12AM),the router can be directly connected to PSTN to serve as a small access server.IV. Support ADSL/ATM/MPLS featuresADSL is a simple but highly-efficient broadband technology that achieves the maximumdata transmission capacity over existing copper wiring by using the digital codemodulation technology. The ADSL module for <strong>AR</strong> <strong>28</strong> <strong>Series</strong> allows themedium-to-small-sized enterprises to reach the DSLAM equipment via PSTN and thenaccess the Internet.ATM transmits, multiplexes, and switches information in cells. <strong>AR</strong> <strong>28</strong> <strong>Series</strong> <strong>Routers</strong>provide 155 Mbps ATM module, support AAL5, and <strong>of</strong>fer traffic services like CBR, VBRand UBR. Hence, such routers are well-suited to the high-speed data service,transmission <strong>of</strong> large packets, and interconnection between midsize or small enterprisenetworks and ATM networks.MPLS, a combination <strong>of</strong> IP and ATM technologies, replaces the traffic identified by IPheader with a short and length-fixed label, based on which a router makes theforwarding decision. It can provide faster forwarding speed, get support from IP routedprotocols, and control protocols, thus satisfying the requirements that various newapplications put on the network. MPLS VPN is a VPN technology that implements theinterconnection <strong>of</strong> private networks via Label Switched Paths (LSPs). As LSP is atunnel across the public network on its own, MPLS has an inherent advantage in terms<strong>of</strong> VPN implementation. <strong>AR</strong> <strong>28</strong> series <strong>Routers</strong> usually act as Label Edge <strong>Routers</strong>(LERs) to implement service classification, label distribution, encapsulation, andmulti-label peel-<strong>of</strong>f by connecting an MPLS domain to a non-MPLS domain orconnecting MPLS domains <strong>of</strong> different service providers.V. Providing Ethernet access solutionBy extending SICs and MIMs, <strong>Quidway</strong> <strong>AR</strong> <strong>28</strong> <strong>Series</strong> <strong>Routers</strong> can provide multipleforms <strong>of</strong> Ethernet interfaces, such as fiber interface/circuit interface, 10/100/1000Mbpsinterface. Thereby, the networking capability <strong>of</strong> the router can be significantlyimproved.1-2
<strong>Installation</strong> <strong>Manual</strong><strong>Quidway</strong> <strong>AR</strong> <strong>28</strong> <strong>Series</strong> <strong>Routers</strong>Chapter 1 OverviewVI. Data security• Supports ID authentication protocols, including PAP (Password AuthenticationProtocol), CHAP (Challenge Handshake Authentication Protocol), data RADIUS(Remote Authentication Dial in User Service).• Implements firewall to prevent invasions from external networks.• Supports VPN (Virtual Private Network, including GRE, L2TP, Huawei dynamicVPN and MPLS L2/L3 VPN) and provides IPSec (IP Security) and IKE (InternetKey Exchange) technologies. Hence, the security <strong>of</strong> the user private network inthe Internet environment can be guaranteed.• Provides backup solutions based on the backup center technology.VII. Online upgrading the s<strong>of</strong>tware version512 KB Boot ROM and 32 MB Flash memory provide the user with adequate physicalcarrier to upgrade the s<strong>of</strong>tware online, add new features, and extend new functionsaccording to market demands.VIII. Chassis<strong>Quidway</strong> <strong>AR</strong> <strong>28</strong> <strong>Series</strong> Router adopts integrated structure design. It performsexcellently on heat dissipation, EMC (Electromagnetic Compatibility) and safety.1.2 SLOTThe following table shows the numbers <strong>of</strong> interfaces and slots on <strong>Quidway</strong> <strong>AR</strong> <strong>28</strong><strong>Series</strong> <strong>Routers</strong> <strong>of</strong> different models:Table 1-1 Numbers <strong>of</strong> interfaces and slots provided by <strong>AR</strong> <strong>28</strong> <strong>Series</strong> <strong>Routers</strong> <strong>of</strong> different modelsItem<strong>AR</strong><strong>28</strong>-09<strong>AR</strong><strong>28</strong>-10<strong>AR</strong><strong>28</strong>-11<strong>AR</strong><strong>28</strong>-30<strong>AR</strong><strong>28</strong>-31<strong>AR</strong><strong>28</strong>-40<strong>AR</strong><strong>28</strong>-80AUX port 1 1 1 1 1 1 1Console port 1 1 1 1 1 1 1Fixed WAN port 1 1 1 - - - -Fixed LAN port 1 1 2 1 2 - -Extended SIC 2 2 2 - - - -Extended MIM 1 1 1 3 3 4 8 Note:“-” means that this type <strong>of</strong> routers does not provide the port.1-3