Quidway AR 28 Series Routers Installation Manual.pdf - Index of

Installation ManualQuidway AR 28 Series RoutersChapter 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 of 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 AR 28 Series 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. AR 28 Series Routersprovide 155 Mbps ATM module, support AAL5, and offer traffic services like CBR, VBRand UBR. Hence, such routers are well-suited to the high-speed data service,transmission of large packets, and interconnection between midsize or small enterprisenetworks and ATM networks.MPLS, a combination of 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 of private networks via Label Switched Paths (LSPs). As LSP is atunnel across the public network on its own, MPLS has an inherent advantage in termsof VPN implementation. AR 28 series Routers usually act as Label Edge Routers(LERs) to implement service classification, label distribution, encapsulation, andmulti-label peel-off by connecting an MPLS domain to a non-MPLS domain orconnecting MPLS domains of different service providers.V. Providing Ethernet access solutionBy extending SICs and MIMs, Quidway AR 28 Series Routers can provide multipleforms of Ethernet interfaces, such as fiber interface/circuit interface, 10/100/1000Mbpsinterface. Thereby, the networking capability of the router can be significantlyimproved.1-2