Cisco SystemsメーカーUBR904の使用説明書/サービス説明書
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CHAPTER Preparing for Instal lation 2-1 2 Prepar ing f or Installation This chapter describes the equip ment and site requirements f or installing the Cisco u BR904 cable modem.
Safety Recommendations Cisco uBR904 Cable Modem Insta llation and Configuration Guide 2-2 Safety Recommendations The following guidelines will help to ensure your safety and protect the equipment. This list does not cov er all potentially hazardous situations, so be alert .
Preparing for Instal lation 2-3 Safety with Electricity Saf ety with Electricity Follo w these basic guidelines when wo rking with any el ectrical equipment: • Disconnect all power and external cables before installing or removing a Cisco uBR904 cable modem.
Safety Recommendations Cisco uBR904 Cable Modem Insta llation and Configuration Guide 2-4 Follo wing are guidelines for pre venting ESD damage: • If you use an ESD wrist strap or ankle strap, ensure that it makes good skin contact and that the equipment end of the ESD strap is attached to an unf i nished surface of the Cisco uBR904 cab le modem.
Preparing for Instal lation 2-5 CISPR 22 Requirements particular instal lation. If this eq uipment does cau se harmful interf erence to radio o r television reception, which can be determined b y turn.
Site Requirements Cisco uBR904 Cable Modem Insta llation and Configuration Guide 2-6 AC Pow e r The A C-input po wer supply in the Cisco uBR904 cable modem uses a power f actor corrector that allo ws the Cisco uBR904 cab le modem to operate on input voltage and frequency within the ranges of 100 to 240 V A C and 50/60 Hz.
Preparing for Instal lation 2-7 Wiring and Cabling If wires exceed recommended di stances, or if wires pass betw een buildings, gi v e special consideration to the effect of a lightning strike in your vicinity .
Site Requirements Cisco uBR904 Cable Modem Insta llation and Configuration Guide 2-8 W e recommend that you replace any cable that is in question to begin the installation with clean, two-way digital data transmission media.
Preparing for Instal lation 2-9 Personal Computer Hardware and Softwa re P ersonal Computer Hardw are and Software The Cisco uBR904 cable modem must be c onnected to a personal computer at the installation site.
Site Requirements Cisco uBR904 Cable Modem Insta llation and Configuration Guide 2-10 Figure 2-1 Cisco uBR904 Cable Modem Footprin t and Outer Dimensions Site En vironment T able 2-1 lists the operating and nonoperating en vironmental site requirement s.
Preparing for Installation 2-11 Preventive Site Configuration: Maintaining Normal Operation T able 2-1 Specifications for Operating and Nono perating En vironments Pre ventive Site Configur ation: Maintaining Nor mal Operation Planning a proper location for the Cisco uBR90 4 cable modem is essential for successful system operation.
Tools for Instal lation Cisco uBR904 Cable Modem Insta llation and Configuration Guide 2-12 P ower Consider ations Follo w these precautions and recommendations when planning po wer connections to the.
Preparing for Installation 2-13 Making a Crossover Ethe rnet Cable Connection Making a Crossov er Ether net Cable Connection The RJ-45 receptacle supports standard stra i g ht-thr ou g h and crosso v e r Ca te go ry 5 UTP (RJ-45) cables. Cisco Systems does not suppl y Category 5 UTP cables; these cables are av ailable commercially .
Configuration Information Cisco uBR904 Cable Modem Insta llation and Configuration Guide 2-14 Note Referring to the RJ-45 pinout in T able 2-2, proper common-mode line termi nations should be used for the unused Category 5 UTP cable pairs 4/5 and 7/8.
Preparing for Installation 2-15 Cisco uBR904 Cable Mode m Installation Checklist Note If an error message is displayed on the uBR904, you can find its explanation in the Cisco Cable CPE Err or Messages book, vie wable online at www .cisco.co m/univ ercd/cc/td/doc/product/cable/cab_mo dm/ubcmerrs.
Site Log Cisco uBR904 Cable Modem Insta llation and Configuration Guide 2-16 Site Log A site log provides a historical record of al l actions rele v ant to the Cisco uBR904 cable modem operation and maintenan ce. K eep the site log in a common place where anyone who performs tasks has access to it.
Preparing for Installation 2-17 Site Log T able 2-5 Site Log Example Date Description of Action P erformed or Symptom Observed Initials.
Site Log Cisco uBR904 Cable Modem Insta llation and Configuration Guide 2-18.
デバイスCisco Systems UBR904の購入後に(又は購入する前であっても)重要なポイントは、説明書をよく読むことです。その単純な理由はいくつかあります:
Cisco Systems UBR904をまだ購入していないなら、この製品の基本情報を理解する良い機会です。まずは上にある説明書の最初のページをご覧ください。そこにはCisco Systems UBR904の技術情報の概要が記載されているはずです。デバイスがあなたのニーズを満たすかどうかは、ここで確認しましょう。Cisco Systems UBR904の取扱説明書の次のページをよく読むことにより、製品の全機能やその取り扱いに関する情報を知ることができます。Cisco Systems UBR904で得られた情報は、きっとあなたの購入の決断を手助けしてくれることでしょう。
Cisco Systems UBR904を既にお持ちだが、まだ読んでいない場合は、上記の理由によりそれを行うべきです。そうすることにより機能を適切に使用しているか、又はCisco Systems UBR904の不適切な取り扱いによりその寿命を短くする危険を犯していないかどうかを知ることができます。
ですが、ユーザガイドが果たす重要な役割の一つは、Cisco Systems UBR904に関する問題の解決を支援することです。そこにはほとんどの場合、トラブルシューティング、すなわちCisco Systems UBR904デバイスで最もよく起こりうる故障・不良とそれらの対処法についてのアドバイスを見つけることができるはずです。たとえ問題を解決できなかった場合でも、説明書にはカスタマー・サービスセンター又は最寄りのサービスセンターへの問い合わせ先等、次の対処法についての指示があるはずです。