Black Box Version 1.0 user manual Local area network integration. Access to Internet, Layer

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•access to Internet

•integration of LANs

•creation of trunk lines between PABX

•increase of subscribers’ lines with the help of Digital Loop Carrier systems

•high-speed access to SDH networks

4.2Local area network integration. Access to Internet

Local area networks facilitate documentation-processing, access to data in modern companies but the Ethernet technology does not allow to transfer data at long distances and create Wide Area Networks (WANs). xDSL can be used for the solution of this problem.

4.2.1TCP/IP stack structure

TCP/IP became widely practiced with the development of the Internet all over the world. It was engineered earlier than the OSI model, and that is why differs greatly.

Fig.1 shows the TCP/IP structure.

TCP/IP protocols are composed of 4 layers:

Layer IV

The lowest layer (Layer IV) corresponds to the physical and data link layers of the OSI reference model. This layer in TCP/IP is not regulated, but it supports all the popular physical and data link layer standards: for LANs, this is Ethernet, for WANs, these are Point-to-Point Protocols, SLIP, Frame Relay. However, when a new LAN and WAN technology appears, it is usually included into TCP/IP stack because of a specially engineered request for comments (RFC), which determines the encapsulation method of IP packets into its frames. Thus, for the encapsulation of IP protocols into ATM cells, there was engineered a special RFC 1483 method. This method is used in Black Box PAM modems as well.

Version: 1.0

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Contents Ethernet Router / Bridge MDS921AE-10BT MDS922AE-10BTSpecifications Firmware Loading Description of Interface Cables Major changes to previous version Version ControlIntroduction Version Specification XDSL technology, background TechnologiesAsymmetric DSL Adsl technology Adsl in briefLine code Isdn DSL technologyNumber of pairs UsageHigh bit rate DSL Hdsl technology Idsl in briefStandard Transmission rateHdsl in brief EXTRAns in brief EXTRAns technologyMdsl in brief Multispeed DSL Mdsl technologyMSDSL, in brief Multispeed DSL Msdsl technologyTransmission medium Straight-line code7.1 G.shdsl, in brief 7 G.shdsl technologyLayer Local area network integration. Access to Internet1 TCP/IP stack structure Correspondence of TCP/IP layers with the OSI model layers IP address classes Address assignment in IP networksMasks Automatic assignment of IP addressesTypes of bridges Bridging of local networksSimple network Version Network before running STA Routing components Routing of networksOptimal path determination Change of packet addresses SwitchingRouting algorithms, RIP Internet Access through LANs, NATStatic Network Address Translation NAT functioningDynamic Address Translation Masquerading NAPT, PATInternal IP Port local NAT port 191.167.0.10 1243 61300 Background Description of the DeviceStructural schematic of MDS92xxx-10BT Master/Slave mode Operation modeConnection at a fixed speed Fixed Mode Connection with an automatic speed regulation Adaptive modeRoute mode Bridge modeEthernet 10BaseT interface ATM interfaceLED Description of LEDsSub-Rack Mechanic DesignMDS920C-10BT, NG, front panel Xdsl Mini-RackMDS922AE-10BT, front panel LED Stand AloneEquipment Installation Version Management of devices of Sub-Rack type Programming GuideIntroduction Management of devices of Mini-Rack and Stand Alone type Command structureCommand tree of bridge mode Command tree of router mode Help command Main menu of the bridge modeHome command Security password from an unauthorized accessLan command Default commandSetip command Show commandList command Password setting Manage commandSetpass command Password disablement Password changeRouter mode setting mode Mode commandBridge mode setting mode Quick command Ping commandANY 10 R1483 commandSetpvc command Delpvc commandPfilter command Setspan command Setqos commandSave command 10.6 6 Show commandRestart command Shdsl shdsl Shdsl commandAnnex command Enable commandTerminal command Adapt command Fix commandPRE Activation Status commandDnsrelay command Ver commandMain menu of the router mode Default command Setdnsip command Delwanip command Ipoa commandSetwanip command Setrip commandDhcpserver command Setdhcp command Addpatin command Pat commandSetpat command Delpatin commandPppoa command Deluser command Adduser commandChpass command Setllc command Echo commandPppoe command 12 R1483 command 12.4 8.3.12.4 Setwanip command WAN Deliproute Rtable commandAddiproute All Deletes Firmware loading guide Firmware LoadingNetwork management interface Technical SpecificationsInterfaces Monitor interface Network interface 10.3 10.3 Climatic conditions Surge safetyProtection against dangerous affects 10.5 10.5 Physical dimensions 10.4 10.4 GuaranteeMonitor connector CONNECTORS’ DescriptionShdsl connector Power connector For MDS922AE-10BT Ethernet 10BaseT connector12.1 «Direct» Ethernet cable Description of Interface CablesCross-over Ethernet cable Typically the delivery set includes Delivery SETGlossary RJ45 RJ11RS232 SplitterTDM Router Example of Network ConfigurationVersion Ethernet IP Subnet mask 0.0.0.0 WAN IP Gateway

Version 1.0 specifications

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