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This preface explains the objectives, intended audience, and organization of the Cisco 6920 RateMux Multiplexer Installation Guide. This section also defines the conventions used to convey instructions and information, defines terms and acronyms, and tells you how to obtain additional information.
This guide provides hardware installation procedures for the Cisco 6920 RateMux multiplexer (referred to in this publication as the Cisco 6920). The guide contains procedures to unpack, install, and configure the hardware to process video services.
This guide is intended for the following cable system personnel:
This guide is organized into the following chapters and appendixes:
This guide uses the following conventions:
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Caution Means reader be careful. You are capable of doing something that might result in equipment damage or loss of data. |
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Note Means reader take note. Notes contain helpful suggestions or references to materials not contained in this guide. |
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TimeSaver Means the described action saves time. You can save time by performing the action described in the paragraph. |
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Tips Means the following information might help you solve a problem. |
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Waarschuwing | Dit waarschuwingssymbool betekent gevaar. U verkeert in een situatie die lichamelijk letsel kan veroorzaken. Voordat u aan enige apparatuur gaat werken, dient u zich bewust te zijn van de bij elektrische schakelingen betrokken risico's en dient u op de hoogte te zijn van standaard maatregelen om ongelukken te voorkomen. Voor vertalingen van de waarschuwingen die in deze publicatie verschijnen, kunt u het gedeelte Regulatory Compliance and Safety Information (Informatie over naleving van veiligheids- en andere voorschriften) raadplegen in dit document. | ||
Varoitus | Tämä varoitusmerkki merkitsee vaaraa. Olet tilanteessa, joka voi johtaa ruumiinvammaan. Ennen kuin työskentelet minkään laitteiston parissa, ota selvää sähkökytkentöihin liittyvistä vaaroista ja tavanomaisista onnettomuuksien ehkäisykeinoista. Tässä julkaisussa esiintyvien varoitusten käännökset löydät tämän asiakirjan Regulatory Compliance and Safety Information -osasta (määräysten noudattaminen ja tietoa turvallisuudesta). | ||
Attention | Ce symbole d'avertissement indique un danger. Vous vous trouvez dans une situation pouvant causer des blessures ou des dommages corporels. Avant de travailler sur un équipement, soyez conscient des dangers posés par les circuits électriques et familiarisez-vous avec les procédures couramment utilisées pour éviter les accidents. Pour prendre connaissance des traductions d'avertissements figurant dans cette publication, consultez la section Regulatory Compliance and Safety Information (Conformité aux règlements et consignes de sécurité) de ce document. | ||
Warnung | Dieses Warnsymbol bedeutet Gefahr. Sie befinden sich in einer Situation, die zu einer Körperverletzung führen könnte. Bevor Sie mit der Arbeit an irgendeinem Gerät beginnen, seien Sie sich der mit elektrischen Stromkreisen verbundenen Gefahren und der Standardpraktiken zur Vermeidung von Unfällen bewußt. Übersetzungen der in dieser Veröffentlichung enthaltenen Warnhinweise finden Sie im Abschnitt "Regulatory Compliance and Safety Information" (Informationen zu behördlichen Vorschriften und Sicherheit) in diesem Dokument. | ||
Avvertenza | Questo simbolo di avvertenza indica un pericolo. La situazione potrebbe causare infortuni alle persone. Prima di lavorare su qualsiasi apparecchiatura, occorre conoscere i pericoli relativi ai circuiti elettrici ed essere al corrente delle pratiche standard per la prevenzione di incidenti. La traduzione delle avvertenze riportate in questa pubblicazione si trova nella documento Regulatory Compliance and Safety Information (Conformità alle norme e informazioni sulla sicurezza) nel presente documento. | ||
Advarsel | Dette varselsymbolet betyr fare. Du befinner deg i en situasjon som kan føre til personskade. Før du utfører arbeid på utstyr, må du vare oppmerksom på de faremomentene som elektriske kretser innebærer, samt gjøre deg kjent med vanlig praksis når det gjelder å unngå ulykker. Hvis du vil se oversettelser av de advarslene som finnes i denne publikasjonen, kan du se i avsnittet Regulatory Compliance and Safety Information (Overholdelse av forskrifter og sikkerhetsinformasjon) i dette dokumentet. | ||
Aviso | Este símbolo de aviso indica perigo. Encontra-se numa situação que lhe poderá causar danos físicos. Antes de começar a trabalhar com qualquer equipamento, familiarize-se com os perigos relacionados com circuitos eléctricos, e com quaisquer práticas comuns que possam prevenir possíveis acidentes. Para ver as traduções dos avisos que constam desta publicação, consulte a secção Regulatory Compliance and Safety Information (Informação de Segurança e Disposições Reguladoras) neste documento. | ||
¡Advertencia! | Este símbolo de aviso significa peligro. Existe riesgo para su integridad física. Antes de manipular cualquier equipo, considerar los riesgos que entraña la corriente eléctrica y familiarizarse con los procedimientos estándar de prevención de accidentes. Para ver una traducción de las advertencias que aparecen en esta publicación, consultar la sección titulada Regulatory Compliance and Safety Information (Información sobre seguridad y conformidad con las disposiciones reglamentarias) que aparece en este documento. | ||
Varning! | Denna varningssymbol signalerar fara. Du befinner dig i en situation som kan leda till personskada. Innan du utför arbete på någon utrustning måste du vara medveten om farorna med elkretsar och känna till vanligt förfarande för att förebygga skador. Om du vill se översättningar av de varningar som visas i denna publikation, se avsnittet "Efterrättelse av föreskrifter och säkerhetsinformation" i detta dokument. | ||
To fully understand the content of this guide, you should be familiar with the following terms and acronyms:
bit rate | The rate at which a compressed bit stream is delivered from the channel to the input of a decoder. |
DHEI | DigiCable Headend Expansion Interface. This digital interface protocol was developed by General Instruments, Inc., and is used for the distribution of video within digital cable head ends. |
DSP | Digital Signal Processor. A specialized digital microprocessor that performs digital grooming, rate conversion, and all other video processing functions on the |
DVB-ASI | Digital Video Broadcast-Asynchronous Serial Interface. Established by the Digital Video Broadcasting standards group, DVB-ASI is a high-speed (270 Mbps) asynchronous serial interface used for distribution of digital video, audio, and data within cable headends or hubs. |
ECMs | Entitlement Control Messages. These are a series of encrypted (data) keys that accompany the scrambled video streams in the MPEG transport. These keys are used by set-top boxes in decrypting or descrambling the video streams. |
MPEG-2 | Motion Picture Experts Group; video compression standard defined by ISO/IEC standards 13818-2. |
PCR | Program Clock Reference. This refers to an MPEG timing mechanism for synchronizing various elementary streams (video, audio) with one another. |
PID | Packet identifier; a unique integer used to differentiate packetized elementary streams (video, audio, or data) within an MPEG transport stream. |
PSI | Program Specific Information. PSI (as defined by MPEG) is a series of tables that define the actual structure of a transport stream. These tables include the PAT (Program Access Table), PMT (Program Map Table), CAT (Conditional Access Table), and NIT (Network Information Table). The PAT and PMT are used primarily in associating particular programs (and its video, audio, and data components) with specific PIDs within the transport. |
PSIP | Advanced Television Systems Committee (ATSC) extensions to the basic MPEG PSI tables to support legacy vertical blanking interval (VBI) data, electronic program guide (EPG), V-Chip, Conditional Access and high-definition television (HDTV) data descriptors. |
SI | Service Information. The DVB consortium extensions to the basic MPEG PSI tables to support a services model and additional data types such as teletext, subtitles, and EPG. |
Transponder | As used in this guide, a multiplex or transport stream. |
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Posted: Thu Mar 29 16:56:42 PST 2001
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