Cisco Systems UBR904 инструкция обслуживания

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. The chapter cont ains the follo wing sections: • Safety Recommendations • Site Requirement s • T ools for Installat ion • Configuration Informatio n • Cisco uBR90[...]

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 . • The installation of your Cisco uBR904 cab le mo dem shou ld be in compl[...]

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. • Do not work alone wh en potentially hazardous condi tions exist. • Ne ver assume th[...]

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 turning the equipment of f and on, the user is encouraged to try to correct the interference by one or more of the following measures: • Reorient or rel[...]

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. Refer to T able 1-1 in the[...]

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 . The electromagn etic pulse caused by lightning or other high-energy phenomena can easily couple enough energy into unshielded conductors t[...]

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. If the cable is of high-quality and was recently installed, replacing the connectors with high-qualit y connectors can also i[...]

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. W e recommend a personal computer with the fo llowing configuration: • A Pentium or 486 processor-based personal computer running the Wi[...]

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. The following ranges are those within which the Cisco uBR904 cable modem will continue to opera[...]

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. Equipment pl ace[...]

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 Cisco uBR904 cable modem: • Check the power at your site before instal lation and during installatio n to ensure that you are recei ving clean po w[...]

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 . Figure 2-2 sho [...]

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. Common-mod e termination reduces electroma gnetic interference (EMI). T o identify the RJ-45 cable[...]

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.pdf . Cisco uBR904 Cab le Modem Installation Chec kli[...]

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. Site l og entries might incl ude the follo wing: ?[...]

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[...]