Cisco Systems UBR904 manual AC Power, Wiring and Cabling, Interference Considerations

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Site Requirements

AC Power

The AC-input power supply in the Cisco uBR904 cable modem uses a power factor corrector that allows the Cisco uBR904 cable modem to operate on input voltage and frequency within the ranges of 100 to 240 VAC and 50/60 Hz.

Refer to Table 1-1in the chapter “Product Overview” for system power specifications, including input voltage and operating frequency ranges.

Wiring and Cabling

Following are guidelines for setting up the wiring and cabling at the installation site. When planning the location of the Cisco uBR904 cable modem, consider the issues of electromagnetic interference (EMI), coaxial cable quality, and distance limitations for signaling, as described in the following sections.

Interference Considerations

When wires are run for any significant distance in an electromagnetic field, interference can occur between the field and the signals on the wires. This fact has two implications for the construction of plant wiring:

Bad wiring practice can result in radio interference emanating from the plant wiring.

Strong EMI, especially when it is caused by lightning or radio transmitters, can destroy the signal drivers and receivers in the Cisco uBR904 cable modem, and can even create an electrical hazard by conducting power surges through lines and into equipment.

(Review the safety warnings in the section “Safety with Electricity” earlier in this chapter.)

Note To predict and remedy strong EMI, you might also need to consult experts in radio frequency interference (RFI).

2-6Cisco uBR904 Cable Modem Installation and Configuration Guide

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Contents Preparing for Installation Safety Recommendations Safety with Electricity Preventing Electrostatic Discharge DamageFCC Requirements For Class a Equipment For Class B EquipmentSite Requirements Cispr 22 RequirementsAC Power Wiring and CablingInterference Considerations Wiring and Cabling Coaxial Cable QualityDistance Limitations Installing the Cisco uBR904 Cable Modem at the Headend Personal Computer Hardware and SoftwareCisco uBR904 Cable Modem Footprint and Outer Dimensions Site EnvironmentPreventive Site Configuration Maintaining Normal Operation General PrecautionsTools for Installation Power ConsiderationsMaking a Crossover Ethernet Cable Connection RJ-45 Receptacle and PlugConfiguration Information RJ-45 Cable IdentificationCisco uBR904 Cable Modem Installation Checklist Site Log Site Log Task Verified by DatePreparing for Installation Site Log
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UBR904 specifications

The Cisco UBR904 is a versatile broadband access device designed to deliver high-speed internet and data services in various deployment scenarios, particularly suitable for cable operators and service providers. This device allows operators to provide broadband services over a wide area, utilizing advanced technologies to ensure reliability and performance.

One of the key features of the UBR904 is its capability to support multiple channels for upstream and downstream communication, allowing for greater bandwidth and improved network performance. With its integrated DOCSIS (Data Over Cable Service Interface Specification) compliance, the UBR904 enables operators to leverage existing coaxial cable infrastructures to deliver data services efficiently. This makes it an ideal choice for operators looking to expand their service offerings without the need for extensive infrastructure changes.

Equipped with a powerful processor and ample memory, the UBR904 is designed for high throughput and low latency, supporting IP data services, voice services, and video on demand. It utilizes advanced modulation techniques and error correction algorithms that enhance data transmission efficiency and reliability. This results in a robust platform capable of meeting the demands of high-density areas while accommodating future growth.

The UBR904 also features flexible management capabilities. It includes support for SNMP (Simple Network Management Protocol), enabling operators to monitor and manage network performance effectively. The device can be easily configured through a graphical user interface or command-line interface, providing system administrators with the tools needed for straightforward deployment and maintenance.

In addition to its core functionalities, the UBR904 integrates security features to protect network traffic and ensure user data integrity. This includes capabilities for secure tunneling and access control lists, which enhance the security of the broadband connection.

Furthermore, the Cisco UBR904 is designed with scalability in mind. Operators can easily scale their networks by adding additional modules or interfaces as demand grows. This ensures that the UBR904 can meet the evolving needs of service providers without necessitating a complete hardware overhaul.

In summary, the Cisco UBR904 is a robust, feature-rich broadband access device that combines high performance, advanced technologies, and scalability, making it an excellent choice for operators looking to deliver high-speed internet and data services across diverse environments. Its ease of use and extensive management features further enhance its appeal, positioning it as a key player in the broadband access market.