3Com DIA3CV1100-02 manual Glossary

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GLOSSARY 43

GLOSSARY

ac Alternating Current. Electric current that reverses its direction of flow periodically according to frequency measured in hertz, or cycles per second.

CO Central Office. A card in the VCN AC chassis; the card provides an Ethernet port and an LMA port; another name for the Line Card (LC).

EMC Electromagnetic compatibility

HDLC High-level Data Link Control. HDLC is a bit oriented, synchronous protocol that applies to the data-link message packaging layer (layer 2 of the ISO/OSI model) for computer communications. messages are transmitted in units called frames, which contain differing amounts of data but which must be organized in a particular way.

Hz Abbreviation for hertz, electrical cycles pr second.

ID Identifier used for the management login procedure.

ISP Internet service Provider. A business that supplies Internet connectivity services to individuals, businesses and other organizations within a local area.

IT Information Technology

Krone connectors Connectors on patch cords used to connect or jumper patch panels

LAN Local Area Network. A group of computers and other devices dispersed over a relatively limited area and connected by a communications link that enables every device to interact with any other on the network.

LED Light Emitting Diode. A semi-conductor device that converts electrical energy into light, used, for example, for the activity lights on the VCN AC and VCN AP units and appears in green or orange.

LMA Local Management Access.

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Contents Visitor and Community Network Access Concentrator 3Com Corporation 5400 Bayfront Plaza Santa Clara, California Contents Page Download Software or Find Documentation VCN Access VCN Access Concentrator Front Panel Describes the front panel VCN AC indicators and connectors Précautions de Preparing the Site Inner wire pair carries both voice and digital date Outer wire pair carries only voice Punch-Down Block Without a Patch Panel VCN Access Point Rear Panel Repeat through for up to 24 telephone lines Mounting the VCN Access Concentrator 19-inch Rack Installing the VCN Access ConcentratorFitting a Bracket for Rack Mounting Back Panel Connections VCN AC Front Panel ConnectionsIs P Pin Assignment for the RJ-21 Connector Line Cards in the VCN Access ConcentratorFemale RJ-21 Connector VCN Access Concentrator Unit Installed Without a Patch Panel Inserting MAC Addresses for VCN Access Concentrator Ports Sequence of ConfigurationManual Procedures for SuperStack II 1100/3300 VCN AC Port and VCN AP MAC Addresses VCN AC Automated Procedures for SuperStack II 1100/3300 ConfApp screen appears Figure Entering the Switch Address Community Parameter Removing Wrong Address For units installed in the USA and Canada Select a flexible Power CordProper Selection Page Troubleshooting LEDs to Solve ProblemsVCN AC Port LED Indications following Post Page Product Specification Product Specification Index VCN AP Glossary Vac MbaudMbps MiniDINGlossary Glossary 3COM Corporation Limited Warranty Governing LAW EMC Statements
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