Cisco uBR7246VXR User Manual

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QUICK START GUIDE

Cisco uBR7246VXR Universal Broadband Router

INCLUDING LICENSE AND WARRANTY

1 Cisco One-Year Limited Hardware Warranty Terms

2 Overview

3 Site Preparation

4 Installing the Chassis

5 Connecting the Chassis to Power

6 Powering on the Cisco uBR7246VXR Router

7 Troubleshooting the Installation

8 Related Documentation

9 Obtaining Documentation and Submitting a Service Request

1 Cisco One-Year Limited Hardware Warranty Terms

There are special terms applicable to your hardware warranty and various services that you can use during the warranty period. Your formal Warranty Statement, including the warranties and license agreements applicable to Cisco software, is available on Cisco.com. Follow these steps to access and download the Cisco Information Packet and your warranty and license agreements from Cisco.com.

1. Launch your browser, and go to this URL:

http://www.cisco.com/en/US/products/prod_warranties_listing.html

The Warranties and License Agreements page appears.

2. To r e ad t he Cisco Information Packet, follow these steps:

a. Click the Information Packet Number field, and make sure that the part number 78-5235-03A0 is highlighted.

b. Select the language in which you would like to read the document.

c. Click Go.

d. The Cisco Limited Warranty and Software License page from the Information Packet appears.

e. Read the document online, or click the PDF icon to download and print the document in Adobe Portable Document

Format (PDF).

Note You must have Adobe Acrobat Reader to view and print PDF files. You can download the reader from Adobe’s

website: http://www.adobe.com

3. To read translated and localized warranty information about your product, follow these steps:

a. Enter this part number in the Warranty Document Number field:

78-10747-01C0

b. Select the language in which you would like to view the document.

c. Click Go. The Cisco warranty page appears.

d. Read the document online, or click the PDF icon to download and print the document in Adobe Portable Document

Format (PDF).

You can also contact the Cisco service and support website for assistance:

http://www.cisco.com/en/US/support/

Duration of Hardware Warranty

One (1) Year

Replacement, Repair, or Refund Policy for Hardware

Cisco or its service center will use commercially reasonable efforts to ship a replacement part within ten (10) working days after receipt of a Return Materials Authorization (RMA) request. Actual delivery times can vary, depending on the customer location.

Cisco reserves the right to refund the purchase price as its exclusive warranty remedy.

To Receive a Return Materials Authorization (RMA) Number

Contact the company from whom you purchased the product. If you purchased the product directly from Cisco, contact your Cisco Sales and Service Representative.

Complete the information below, and keep it for reference.

Company product purchased from

Company telephone number

Product model number

Product serial number

Maintenance contract number

2 Overview

The Cisco uBR7246VXR universal broadband router is used in Cisco Cable Modem Termination System (CMTS) solutions. The router allows high-speed data services to be packaged similar to basic cable television service or video fare.

The Cisco uBR7246VXR router:

• Supports data and packetized voice connectivity over a bidirectional cable television and IP backbone network.

• Supports high-speed Internet access, IP telephony, and Virtual Private Network (VPN) applications.

• PacketCable 1.0, Data-over-Cable Service Interface Specification (DOCSIS) 1.1 and EuroDOCSIS 1.1 qualified.

• Supports DOCSIS- or EuroDOCSIS-based cable interfaces and cable modems (or set-top boxes with integrated DOCSIS or

EuroDOCSIS cable modems).

• Supports both 6-MHz North American channel plans using ITU-T J.83 Annex B operation and 8-MHz phase alternating line (PAL) and SEquential Coulour Avec Memoire (SECAM) channel plans using ITU-T J.83 Annex A operation.

• Works in conjunction with dialup access products to support upstream traffic from DOCSIS-based cable interfaces connected to the public switched telephone network (PSTN).

• Includes environmental monitoring and reporting functions.

• Supports online insertion and removal (OIR). However, the I/O controller, network processing engine (NPE), and clock card

do not support OIR. You must power down the chassis before removing these components.

• Is fully radio frequency (RF) hardened to ensure virtually noise-free transmission.

• Supports N + 1 redundancy solutions using the Cisco RF switch.

• Supports 1+1 interchassis redundancy (does not require the RF switch).

The Cisco uBR7246VXR routers may be installed on a tabletop or rack-mounted. A rack-mount kit ships from the factory with each router. The rack-mount kit includes the hardware used to mount the router in a standard 19-inch equipment rack or relay-type rack.

Warning

For translations of the warnings used in this document, see the Cisco uBR7200 Series Regulatory Compliance and Safety Information document that comes with this router. Reference the translations by statement number (example: Statement 1020).

Only trained and qualified personnel should be allowed to install, replace, or service this equipment.

Statement 1030

Cisco uBR7246VXR Components

The Cisco uBR7246VXR universal broadband router components include:

• Cable interface line cards (also called line cards) that interface to the cable television network.

• Port adapters that connect to the IP backbone and external networks.

• A fan tray, enclosing internal fans that draw cooling air into the chassis to maintain an acceptable operating temperature.

• AC or DC power supplies–the Cisco uBR7246VXR supports an optional redundant power supply.

• A Cisco cable clock card that allows you to lock onto and propagate a T1 clock signal throughout the router midplane.

• One network processing engine (NPE) that performs system management functions for the chassis.

• An I/O controller that shares the system memory functions and the environmental monitoring functions with the network

processing engine.

Note The I/O controller is not required if you are using the Cisco uBR7200-NPE-G1 network processing engine.

For specific instructions to install, remove, or replace system components, refer to the Configuration Notes directory at the following URL:

http://www.cisco.com/en/US/products/hw/cable/ps2217/tsd_products_support_configure.html

Figure 1 Front and Rear Chassis Views

DS1-RF

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uBR

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Internal fans

Clock card

Fan tray handle

Captive installation screws (line cards)

Cable interface line cards

Port adapters

I/O controller

Console port

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1. AC power supplies are shown in this illustration. DC power supplies are also available.

Auxiliary port

Optional Fast Ethernet port (M11 and RJ-45 receptacles)

PCMCIA slots

AC plug

Power switch

Power supply handle

AC-input power supply

Network processing engine (NPE)

109

103555

Card Slot and Logical Interface Numbering

Port adapter and cable interface line card slots maintain the same slot number regardless of whether other port adapters or cable interface line cards are installed or removed. However, when you move a port adapter or a line card to a different slot, the logical interface number changes to reflect the new slot number.

Figure 2 Slot Numbers and Locations

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Slot 3

Slot 4

3 Site Preparation

Check the following:

• Site is capable of maintaining an ambient temperature of 32 to 104 degrees Fahrenheit

• Site power is available and adequate

• Cabling requirements (type, distance)

• Rack-mounting requirements (working space, proper airflow)

Site Environment

Warning

This unit is intended for installation in restricted access areas. A restricted access area can be accessed only through the use of a special tool, lock and key, or other means of security.

This product requires short-circuit (overcurrent) protection, to be provided as part of the building installation. Install only in accordance with national and local wiring regulations.

Statement 1017

Statement 1045

Temperature and Humidity Requirements

Table 1 lists the nominal operating and nonoperating environment requirements. Any measurements that approach the minimum or maximum of a range indicate a potential problem.

Table 1 Operating and Nonoperating Environments

Specification Minimum Maximum

Temperature, ambient operating

Temperature, ambient nonoperating and storage

Humidity, ambient (nonconducting) operating 10% 90%

Humidity, ambient (noncondensing) nonoperating and storage 5% 95%

Altitude, operating and nonoperating –197 ft (–60 m) 13,123 ft (4000 m)

Vibration, operating

Vibration, nonoperating

32° F (0° C)

-4° F (-20° C)

— 5 to 200 Hz, 0.5 g (1 octet/min.)

— 5 to 200 Hz, 1 g (1 octet/min.)

104° F (40° C)

149° F (65° C)

200 to 500 Hz, 2 g (1 octet/min.)

Power Guidelines

Follow these precautions and recommendations when planning power connections to the Cisco uBR7246VXR router:

• Check the power at your site before installation and periodically after installation to ensure that you are receiving clean power. Install a power conditioner if necessary.

• Provide proper grounding.

• Make sure that the frame ground is tied to a single building ground.

• Use a 6-AWG, copper ground conductor (minimum requirement) when attaching the chassis ground to a headend or other

interior ground system.

Warning

A readily accessible two-poled disconnect device must be incorporated in the fixed wiring.

Statement 1022

Power Connection Guidelines for DC-Powered Systems

The DC-input power supply allows the Cisco uBR7246VXR router to operate on either -48 or -60 VDC systems.

Warning

The Cisco uBR7246VXR router (using DC power supplies) is not shipped with wiring to connect to a DC power source. You must provide input, return, and earthing (grounding) wiring at the site, and install and protect the wiring in accordance with local and national wiring regulations.

Connect the unit only to DC power source that complies with the safety extra-low voltage (SELV) requirements in IEC 60950 based safety standards.

Statement 1033

Cabling Guidelines

When planning the location of a new system, keep in mind signal type, signal speed, and transmission medium, as well as distance limitations for signaling, EMI, and connector compatibility. Use this information as a guideline in planning your network connections prior to installing the Cisco uBR7246VXR router.

Ethernet and Fast Ethernet Connections

The maximum distances for Ethernet and Fast Ethernet network segments and connections depend on the type of transmission cable being used. See Table 2 for the maximum transmission distances between stations.

Table 2 Ethernet and Fast Ethernet Maximum Transmission Distances

Transceiver Speed Cable Type Transmission Mode Maximum Distance Between Stations

10 Mbps Category 3 Full duplex and half duplex 328 ft (100 m)

10 Mbps Multimode (MMF) Full duplex and half duplex 1.2 mi (2 km)

100 Mbps Category 5

Category 5e

100 Mbps Category 6 Full duplex and half duplex 328 ft (100 m)

100 Mbps MMF Half

100 Mbps Singlemode (SMF) Half

Full duplex and half duplex 328 ft (100 m)

1312 ft (400 m)

Full

1.2 mi (2 km)

1312 ft (400 m)

6.2 mi (10 km)

For details about Ethernet 10BaseT and 100BaseTX cables, refer to the Ethernet 100BaseTX and 10BaseT Cables: Guidelines and Specifications document at the following URL:

http://www.cisco.com/en/US/products/hw/routers/ps133/products_tech_note09186a00801f5d9e.shtml

Coaxial Cable Connections

Keep in mind the following information when you are setting up and cabling your system.

• The length of the cable determines the amount of signal loss.

• Headend-grade cable (quad-shield 59-series minimum) is recommended.

• Do not bend the coaxial cable tighter than the cable manufacturer's specified minimum bend radius.

• Do not tighten cable connections (F connectors) more then 10 to 15 in-lbs (1.73 to 2.31 nm).

• To prevent connection problems, always use the same size coaxial cable. For example, going from a 6-series cable to a

59-series cable may cause reliability issues (intermittent contact) in the headend environment.

4 Installing the Chassis

Rack-Mount Installation Guidelines

• Allow sufficient clearance around the rack for maintenance.You need 36 in. (91.44 cm) of clearance to remove and replace

system components.

• If the Cisco uBR7246VXR chassis is the only unit in a rack, mount the chassis at the bottom of the rack. Use the rack-mount kit that comes with the chassis.

• Always place the heavier equipment in the lower half of the rack.

• If the rack is provided with stabilizing devices, install the stabilizers before mounting the chassis.

• Make sure that an open or relay racks are bolted to the floor.

• When mounting the chassis in 4-post or relay racks, use all the screws and brackets that are provided.

• For 23-inch racks, order optional mounting brackets from third-party vendors.

Workbench and Tabletop Installation Guidelines

When installing the router on a workbench or tabletop, check the following:

• There is at least 3 inches (7.72 cm) of clearance at the inlet and exhaust vents (the right and left sides of the router).

• There is approximately 23.25 inches (59.06 cm) of clearance at the front, and 19 inches (48.3 cm) at the back of the router

for installing and replacing field-replaceable units (FRUs), or accessing network cables or equipment.

• There is adequate ventilation (it is being installed in an enclosed cabinet where ventilation is adequate).

• Blank panels are installed in any slot that does not have a component.

• The cable-management bracket and four M4 x 6-mm Phillips panhead screws are set aside (if required).

Warning

Do not stack the chassis on any other equipment. If the chassis falls, it can cause severe bodily injury and equipment damage.

Statement 48

Installation Tools and Equipment

The tools and equipment listed below are recommended as the minimum necessary to install the Cisco uBR7246VXR router. Other equipment may include test equipment to check electronic and optical signal levels, power levels, and communications links.

• Rack-mounting kit (includes brackets and screws)

• Number 2 Phillips screwdriver

• 3/16-inch flat-blade screwdriver

• 1/4-inch flat-blade screwdriver

• 8-mm wrench or nut driver, or adjustable wrench

• 7-mm wrench or nut driver, or adjustable wrench

• DC-input cable—14 AWG (2.08 mm

• AC-input cable—18 AWG cable with a 3-lead IEC-320 receptacle on the power supply end, and a country-dependent plug

on the other end

• Antistatic mat or antistatic foam and electrostatic discharge (ESD) grounding strap or the disposable ESD strap

• Wire stripper and crimping tool. (The accessory kit comes with ground lugs and M5 screws with captive, locking washers.)

• Wire—6 AWG (16 mm), provided by the customer

) cable with a minimum of three conductors rated for at least 140° F (60 ° C)

Verifying Contents After Unpacking

Power cables, manuals, and other additional items are packaged in separate boxes. After you have unpacked the system, verify that you have received all the required components and documentation.

Step 1 Using the packing list as a guide, verify that you have received everything that is listed, including the following:

a. System hardware documentation and software documentation (if ordered).

b. Optional equipment that you ordered, such as transceivers (GBICs), flash cards, cables, or special connectors.

Step 2 Check that all equipment you ordered is installed in the chassis.

Step 3 Ensure that the system configuration matches the packing list.

Attaching the Rack-Mount Brackets

Before installing the chassis in the rack, you must install rack-mount brackets on each side of the front, middle, or rear of the chassis. If you are rack-mounting the chassis from the front, you cannot use the cable-management bracket. If you are rack-mounting the chassis at the rear or middle of the chassis, both rack-mount brackets and the cable-management bracket must be installed on the chassis before the chassis is installed in the rack.

Figure 3 Rack-Mount Bracket Options

Rack-mount bracket

103554

Rack-mount bracket

Installed in 4-post rack—rear installation

Installed in 4-post rack—flush front installation

Installed in 4-post rack—protruding front installation

Installed in open or relay-type tack

Attach the Rack-Mount Brackets to the Rear of the Chassis

To install the rack-mount brackets on the chassis for a rear rack-mount configuration, complete the following steps:

Step 1 Locate the threaded holes in the rear sides of the chassis.

Step 2 Align the first rack-mount bracket to the threaded holes in the right side of the chassis. See Figure 4.

Figure 4 Installing the Rack-Mount Brackets on the Rear of the Chassis

Rack-mount bracket

103560

Note There are eight holes in each of the rack-mount brackets for the Cisco uBR7246VXR. You may use either set

of four holes to align the bracket to the threaded holes in the sides of the chassis.

Step 3 Thread the four M4 x 6-mm Phillips flathead screws through the rack-mount bracket and into the side of the chassis.

Use a number 2 Phillips screwdriver to tighten the screws.

Step 4 Repeat Step 1 through Step 3 for the other rack-mount bracket.

Step 5 See the “Installing the Cable-Management Brackets” section on page 11 for cable management bracket instructions.

Attach the Rack-Mount Brackets to the Front of the Chassis

To install the rack-mount brackets on the chassis for a front rack-mount configuration, complete the following steps.

Step 1 Locate the threaded holes in the front sides of the chassis.

Step 2 If you want the front of the chassis flush with the front of the rack, align the first rack-mount bracket to the threaded

holes in the right side of the chassis as shown in Figure 5

If you want the front of the chassis protruding from the rack, align the first rack-mount bracket to the threaded holes in the right side of the chassis as shown in Figure 6.

Note There are eight holes in each of the rack-mount brackets. You may use either set of four holes to align the bracket to

the threaded holes in the sides of the chassis.

Step 3 Thread the four M4 x 6-mm Phillips flathead screws through the bracket and into the side of the chassis. Use a

number 2 Phillips screwdriver to tighten the screws.

Step 4 Repeat Step 1 through Step 3 for the other rack-mount bracket.

Figure 5 Installing the Rack-Mount Brackets so the Front of the Chassis Is Flush with the Rack

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Rack-mount bracket

Note You cannot use the cable management bracket in this configuration.

Figure 6 Installing the Rack-Mount Brackets so the Front of the Chassis Protrudes Out of the Rack

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Rack-mount bracket

Attach the Rack-Mount Brackets to the Middle of the Chassis

To install the rack-mount brackets for an open or relay-type rack-mount configurations, complete the following steps:

Step 1 Locate the threaded holes in the middle sides of the chassis.

Step 2 Align the first rack-mount bracket to the threaded holes in the right side of the chassis, as shown in Figure 7. Use either

set of four holes to align the bracket to the threaded holes in the sides of the chassis.

Step 3 Thread the four M4 x 6-mm Phillips flathead screws through the rack-mount bracket and into the side of the chassis.

Use a number 2 Phillips screwdriver to tighten the screws.

Step 4 Repeat Step 1 through Step 3 to attach the other rack-mount bracket.

Step 5 See the “Installing the Cable-Management Brackets” section on page 11 for cable management bracket instructions.

Figure 7 Installing the Rack-Mount Brackets in the Middle of the Chassis for Open or Relay-Type Racks

Rack-mount

Rack-mount bracket

bracket

103561

Installing the Cable-Management Brackets

If you are rack-mounting the chassis at the rear or middle of the chassis, both rack-mount brackets and the cable-management bracket must be installed before the chassis is installed in the rack. See Figure 8 for cable management bracket locations.

To install the cable-management bracket, complete the following steps:

Step 1 Align the cable-management bracket with the four right front threaded holes in the chassis.

Step 2 Thread four M4 x 6-mm Phillips flathead screws through the bracket and into the chassis, and use a number 2 Phillips

screwdriver to tighten the screws.

Figure 8 Location of Cable Management Bracket

1 2

Cable

management

bracket

Rack-mount bracket

103571

Rack-mount bracket

Cable-management

bracket

Location of cable management bracket—rear mount

Location of cable management bracket—middle mount

Installing the Chassis in the Rack

Warning

Caution Because the brackets support the weight of the entire chassis, be sure to use all of the required slotted screws to

Warning

This unit is intended for installation in restricted access areas. A restricted access area can be accessed only through the use of a special tool, lock and key, or other means of security.

fasten the two rack-mount brackets to the rack posts.

To prevent bodily injury when mounting or servicing this unit in a rack, you must take special precautions to ensure that the system remains stable. The following guidelines are provided to ensure your safety:

This unit should be mounted at the bottom of the rack if it is the only unit in the rack.

When mounting this unit in a partially filled rack, load the rack from the bottom to the top with the heaviest component at the bottom of the rack.

If the rack is provided with stabilizing devices, install the stabilizers before mounting or servicing the unit in the rack.

Statement 1006

To prevent personal injury or damage to the chassis, never attempt to lift or tilt the chassis using the handles on modules (such as power supplies, fans, or cards); these types of handles are not designed to support the weight of the unit.

Statement 1032

Statement 1017

To install the chassis in the rack:

Step 1 On the chassis, ensure that the captive screws on all the router modules are tight and that the port adapter retention

clip is in the locked position.

Step 2 Make sure that your path to the rack is unobstructed. If the rack is on wheels, ensure that the brakes are engaged or

that the rack is otherwise stabilized.

Tip Two people should perform Step 3 through Step 7, because a fully loaded chassis weighs ~100 lbs (45.4 kg).

Step 3 Position the chassis so that the front end is closest to you; then lift the chassis and move it to the rack.

Step 4 Slide the chassis into the rack, pushing it back until the brackets installed on the chassis meet the mounting strips or

posts on both sides of the equipment rack.

Tip The rack-mount bracket must be placed behind the rack post or mounting strip in the rear installation configuration.

(See Figure 4 on page 9.)

Step 5 While keeping the brackets flush against the posts or mounting strips, position the router so that the holes in the

brackets are aligned with those in the mounting strips.

Step 6 Insert the 10/32 x 3/8 slotted screws (two to a side) through the brackets and into the mounting strip (use the top and

bottom bracket holes.

Step 7 Using a 7/16-inch, flat-blade screwdriver, tighten all the screws.

Installing the Chassis on a Workbench or Tabletop

Complete the following steps to install the Cisco uBR7246VXR router on a workbench or tabletop:

Step 1 Remove any debris and dust from the tabletop or workbench, and the surrounding area.

Step 2 On the chassis, ensure that all captive screws on the network processing engine, the I/O controller, the line cards, the

clock card, and each power supply are tightened and the port adapter retention clip is in the locked position.

Step 3 Place the Cisco uBR7246VXR router on the tabletop or workbench.

Step 4 Ensure that there is the appropriate amount of space around the router.

Connecting the Chassis to Ground

Before connecting power and turning on the router, you must provide an adequate ground connection for your system. Two M5 ground receptacles provide a chassis ground connection for electrostatic discharge (ESD). The receptacles are located adjacent to the lower power supply bay on the Cisco uBR7246VXR router chassis. See Figure 9.

Figure 9 Chassis Ground Location

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Chassis ground location

Caution The Cisco uBR7246VXR router installation must comply with all applicable codes and is approved for use with

copper conductors only. The ground bond fastening hardware should be of compatible material and preclude loosening, deterioration, and electrochemical corrosion of hardware and joined material. Attachment of the chassis ground to a headend, hub, or other interior ground system should be made with a 6-AWG, copper ground conductor at a minimum.

Warning

Complete the following steps to connect the Cisco uBR7246VXR router chassis to ground:

Use copper connectors only.

This equipment must be grounded. Never defeat the ground conductor or operate the equipment in the absence of a suitably installed ground conductor. Contact the appropriate electrical inspection authority or an electrician if you are uncertain that suitable grounding is available.

Statement 1025

Statement 1024

Step 1 Ensure that there is no power going to the router.

Step 2 Strip approximately 0.75 in (2 cm) of shielding from the wire.

Step 3 Insert the stripped end of the wire into the open end of the ground lug, and crimp the lug.

Step 4 Slide a segment of heat shrink tubing over the exposed grounding lug and wire connection.

Step 5 Shrink the tubing in place, using a suitable heating device.

Step 6 Attach the grounding lug to the router using two M5 hex head screws. See Figure 9 on page 13.

Step 7 Connect the other end of the grounding wire to an appropriate ground source.

5 Connecting the Chassis to Power

Following are the procedures for connecting AC-input or DC-input power to your Cisco uBR7246VXR router.

Warning

Note Detailed instructions for handling and replacing the Cisco uBR7246VXR router power supplies are contained in the

This unit might have more than one power supply connection. All connections must be removed to de-energize the unit.

Statement 1028

Take care when connecting units to the supply circuit so that wiring is not overloaded.

This equipment has been designed for connection to TN and IT power systems.

Read the installation instructions before connecting the system to the power source.

Before working on equipment that is connected to power lines, remove jewelry (including rings, necklaces, and watches). Metal objects will heat up when connected to power and ground and can cause serious burns or weld the metal object to the terminals.

documents Cisco uBR7200 Series 550-Watt AC-Input Power Supply Replacement Instructions and Cisco uBR7200 Series 550-Watt DC-Input Power Supply Replacement Instructions at the following URL:

Statement 43

Statement 1007

Statement 1018

Statement 1004

http://www.cisco.com/en/US/products/hw/cable/ps2217/prod_configuration_examples_list.html

Figure 10 AC and DC Power Supplies

Cable retention clip

Captive installation screw

AC receptacle

Power switch

Handle

1 2

Captive installation screw

M5 grounding lugs

Strain relief studs

Power receptacle

Power switch

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AC Power Supplies

Step 1 At the rear of the router, ensure that the power switch on the power supply is in the OFF (0) position.

Step 2 Slide the cable-retention clip to the left, away from the AC receptacle, and plug in the power cable.

Step 3 Secure the cable in the power supply AC receptacle by sliding the cable-retention clip to the right until it fits around

the connector. The cable-retention clip provides strain relief for the AC power cable.

Tip For additional AC power cable strain relief, secure the cable to the power supply handle by inserting a nylon cable tie

through the hole in the handle and around the cable.

Step 4 Plug the AC power supply cable into the AC power source.

Step 5 Repeat Step 1 through Step 4 for the second power supply (if present).

Figure 11 Connecting AC-Input Power

Power

receptacle

Captive

installation

screw

AC power cable

DC Power Supplies

Warning

Before performing any of the following procedures, ensure that power is removed from the DC circuit.

1003

When installing or replacing the unit, the ground connection must always be made first and disconnected last.

Statement 1046

Power switch

Handle

103562

Statement

Warning

Note The color-coding of the DC-input power supply leads depends on the color-coding of the DC power source at your site.

A readily accessible two-poled disconnect device must be incorporated in the fixed wiring.

Typically, green or green/yellow is used for ground, black is used for +48V (return), and red or white is used for –48V. Make certain that the lead color-coding you choose for the DC-input power supply matches lead color-coding used at the DC power source.

Statement 1022

Tools

• 8-mm wrench or nut driver, or adjustable wrench (for connecting a grounding lug to a DC-input power supply only)

• 7-mm wrench or nut driver, or adjustable wrench (for connecting the DC-input power lead strain-relief cover to a DC-input

power supply only)

• 14 AWG (2.08 mm supply installations only)

• Standard wire stripper

Step 1 Ensure that the –48V and +48V leads are disconnected from the power source.

Step 2 At the rear of the router, check that the power switch on the power supply is in the OFF (0) position.

Step 3 Connect the two-hole grounding lug on the ground wire to the M5 grounding receptacles with the two M5 nuts. Tighten

the nuts using an 8-mm wrench or nut driver (or adjustable wrench). See Figure 12.

Step 4 Using a wire stripper, strip approximately 0.55 inch (14 mm) from the –48V and +48V leads.

Step 5 Insert the stripped end of the +48V lead all the way into the +48V lead receptacle and tighten the receptacle screw using

a 3/16-inch flat-blade screwdriver. Repeat for the –48V lead.

Step 6 Make sure that the entire stripped end of each lead is inserted all the way into its receptacle. If any exposed wire at the

stripped end of a lead is visible after inserting the lead into its receptacle, remove the lead from the receptacle, use the wire stripper to cut the stripped end of the lead, and repeat Step 4 and Step 5.

Step 7 After tightening the receptacle screws and nuts for the ground, +48V, and –48V DC-input leads, run the +48V and –48V

leads between the two strain-relief studs on the power supply faceplate. (See Figure 12 on page 18.)

Step 8 Install the strain-relief cover over the +48V and –48V leads and secure the cover to the strain-relief studs using the two

M4 nuts with a 7-mm wrench or nut driver (or adjustable wrench). (See Figure 12.)

Step 9 Connect the ground wire, +48V lead, and –48V lead to the power source.

) cable with a minimum of three conductors rated for at least 140 ° F (60° C) (for DC-input power

Caution Each DC-input power supply has an electrical current rating of 14 A, 700 VA. Use a minimum of 14 AWG

(2.08 mm

) wire for the input to each DC-input power supply. The power input must be protected by a 20 A circuit

breaker or fuse that is in compliance with your local electric regulations.

Warning

The illustration shows the DC power supply terminal block. Wire the DC power supply using the appropriate wire terminations at the wiring end, as illustrated. The proper wiring sequence is ground to ground, positive to positive (line to L), and negative to negative (neutral to N). Note that the ground wire should always be connected first and disconnected last.

Statement 61

Figure 12 Replacing the Strain-Relief Cover on a DC-Input Power Supply

Power switch

Captive

installation screw

(on both sides of

power supply)

M5 grounding receptacles

M5 grounding lug

– 48V lead

+ 48V lead

Power receptacle

Strain-relief cover

M4 nuts

103573

Tip Figure 12 shows the grounding lug connected to the two vertically aligned M5 grounding receptacles. You may also

connect the grounding lug to the two horizontally aligned M5 receptacles.

Cabling

For information about cabling, refer to the field-replaceable unit (FRU) documents at the following URL:

http://www.cisco.com/en/US/products/hw/cable/ps2217/prod_installation_guides_list.html

6 Powering on the Cisco uBR7246VXR Router

Warning

After installing your Cisco uBR7246VXR universal broadband router and connecting cables, power on the router as follows:

Step 1 Check for the following:

Caution If the port adapters, cable interface line cards, network processing engine, or I/O controller are not properly seated

Step 2 Place the power switch on the power supply in the ON (|) position. Repeat this step if a second power supply is installed.

Step 3 Listen for the fans; you should immediately hear them operating. In a very noisy environment, also look for air

Step 4 During the boot process, observe the system LEDs. The LEDs on most of the port adapters come on and go off in an

Step 5 Observe the initialization process. When the system boot is complete (a few seconds), the NPE begins to initialize the

Blank faceplates and cover panels serve three important functions: they prevent exposure to hazardous voltages and currents inside the chassis; they contain electromagnetic interference (EMI) that might disrupt other equipment; and they direct the flow of cooling air through the chassis. Do not operate the system unless all cards, faceplates, front covers, and rear covers are in place.

a. Every module is securely inserted in the right slot and the captive installation screws are tightened.

b. All network interface line cables are connected to the port adapters.

c. Hybrid fiber-coaxial (HFC) network coaxial cable is connected to the cable interface cards.

d. Primary and secondary DB-15 T1 interface cables are attached to the clock card.

e. Each port adapter is inserted in its slot and the port adapter lever or retention clip is in the locked position.

or not fully locked into place, the Cisco uBR7246VXR router might enter a continuous restart loop.

f. A flash memory card is installed in its Personal Computer Memory Card International Association (PCMCIA) slot.

g. Each AC-input power cable is connected and secured with the cable-retention clip.

h. The +48 and –48 DC leads are secured underneath the strain-relief cover on the power supply faceplate.

i. Each DC lead is connected and secured to the power source and the chassis is properly grounded.

j. For installed DC-input power supplies, ensure that the power source is restored.

k. The console terminal is turned on.

The green OK LED on the power supply comes on.

movement around the chassis to verify that the fans are operating. If the Cisco uBR7246VXR router was recently switched off, it might take up to 90 seconds for the power supply to restart and the fans to start operating.

irregular sequence. Some may come on, go off, and come on again for a short time. On the I/O controller, the POWER OK LED comes on immediately.

port adapter, cable interface line cards, and the I/O controller. During this initialization, the LEDs on each port adapter behave differently (most flash on and off). The ENABLED LED on each port adapter and cable interface line card comes on when initialization is complete, and the console screen displays a script and system banner similar to the following:

Statement 1029

Tip To facilitate headend or hub installation, a Cisco uBR7246VXR universal broadband router equipped with at least one

cable interface line card (Cisco uBR-MC16C,E,S,X or Cisco uBR-MC28C,X), generates a downstream IF carrier when it starts running. The downstream IF carrier will be present if the line card is properly installed and passes diagnostics, the router has been powered on for more than two minutes, the IF downstream shutdown command (no cable downstream if-output) has not been configured, or the Cisco uBR7246VXR router is not in ROMMON mode.

The amplitude and shape of the downstream IF carrier does not change after the router is configured, regardless of modulation scheme used whether 64 or 256-QAM.

Tip By default, Cisco uBR-MC16U or Cisco uBR-MC28U cable interface line cards have no output until the DS freq is set

and the command no cab down rf-shut is applied.

7 Troubleshooting the Installation

This section contains information to help installers and technicians troubleshoot the hardware installation.

Figure 13 shows the general troubleshooting strategy used to troubleshoot the hardware. Refer to this flow chart as necessary, and follow the steps to isolate hardware problems to a specific subsystem.

For cable-specific commands for the Cisco uBR7246VXR universal broadband router, refer to Cisco Broadband Cable Command Reference Guide at the following URL:

http://www.cisco.com/en/US/products/hw/cable/ps2217/prod_command_reference_list.html

Resolve the problem if possible or contact the Cisco Technical Assistance Center.

Figure 13 Troubleshooting Strategy for Startup Problems

Troubleshoot

No No

power

subsystem

Troubleshoot

Fans

I/O

Port

LEDs

on?

cooling

subsystem

Troubleshoot I/O

No No

controller

and restart

Troubleshoot

No No

port adapters

and restart

DC OK

LED on?

Fans

operating?

Yes

I/O

controller

LEDs

Yes

Port adapter enabled

LEDs

on?

Yes

Obtain

technical

assistance

End

62742

End

Cable interface

card

LEDs OK?

Yes

Digital

data

connections

enabled?

Yes

System

startup

successful

Reseat cable

interface

cards and

restart

Troubleshoot

headend setup for

RF and data

Turn on

system power

Check system

state with

interface card

LEDs

Interface card

LEDs OK?

Check the

headend

setup

Digital

data

connections

enabled?

Yes

DC OK

LED on?

Yes Yes

operating?

Yes

Check system

state with I/O

controller LEDs

controller

LEDs

Yes

Check system state with port adapter LEDs

adapter enabled

Yes

Identify Startup Problems

Startup problems are commonly caused by source power problems or a board (network processing engine, I/O controller, port adapter, or cable interface line card) that is not properly connected to the midplane. With the exception of the fan tray and network processing engine, LEDs indicate all system states in the startup sequence. By checking the state of the LEDs, you can determine when and where the system failed in the startup sequence.

1. First check that you are properly plugged into the power source. Then verify that the cards are properly installed. If the port adapter ENABLED LED remains off after you have verified that it is properly installed, verify that the hardware revision of the port adapter in question is supported by the Cisco uBR7246VXR. Use the show diag command (Router# show diag slot) to determine the type of port adapter and then check the product website to determine compatibility.

2. The system cannot operate unless the I/O controller and network processing engine are installed properly. Check that these modules are properly installed in the chassis.

Note If you are using a Cisco uBR7200-NPE-G1, you do not need an I/O controller module installed in the chassis. Use

the show version command (Router# show version) to determine the NPE that is installed in your router.

3. If the clock card ENABLED LED is off, verify that the card is securely installed in the chassis.

4. Always verify that the fans are operating. If the following message is displayed,

Queued messages: %ENVM-1-SHUTDOWN: Environmental Monitor initiated shutdown

This message indicates that the system has detected an overtemperature condition or power out-of-tolerance condition inside the chassis.

shuts down, use the

The shutdown message could also indicate a faulty component or temperature sensor. Before the system

show environment or show environment table command to display the internal chassis

environment.

Other Troubleshooting Information Websites

These websites are provided to help you find the most current troubleshooting information:

• Search the Cisco TAC assistance website, at the following URL:

http://www.cisco.com/en/US/support/index.html

Choose the type of information you need (Hardware Support, Software Support, Technical Support, Tools, Downloads).

• Search cable products field notices at the following URL:

http://www.cisco.com/public/support/tac/fn_index.html

8 Related Documentation

• Cisco uBR7200 Series Universal Broadband Router Hardware Installation Guide, at the following URL:

http://www.cisco.com/en/US/products/hw/cable/ps2217/prod_installation_guides_list.html

• Field-replaceable units (FRU) information, at the following URL:

http://www.cisco.com/en/US/products/hw/cable/ps2217/prod_installation_guides_list.html

• Cisco uBR7200 Series Universal Broadband Router Software Configuration Guide, at the following URL:

http://www.cisco.com/en/US/products/hw/cable/ps2217/products_installation_and_configuration_guides_list.html

• Cisco Broadband Cable Command Reference Guide, at the following URL:

http://www.cisco.com/en/US/products/hw/cable/ps2217/prod_command_reference_list.html

• Regulatory Compliance and Safety Information for the Cisco uBR7200 Series Universal Broadband Router, at the following

URL:

http://www.cisco.com/en/US/docs/cable/cmts/ubr7200/regulatory/compliance/ub72rcsi.html

9 Obtaining Documentation and Submitting a Service Request

For information on obtaining documentation, submitting a service request, and gathering additional information, see the monthly What’s New in Cisco Product Documentation, which also lists all new and revised Cisco technical documentation, at:

http://www.cisco.com/en/US/docs/general/whatsnew/whatsnew.html

Subscribe to the What’s New in Cisco Product Documentation as a Really Simple Syndication (RSS) feed and set content to be delivered directly to your desktop using a reader application. The RSS feeds are a free service and Cisco currently supports RSS version

2.0.

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Cisco has more than 200 offices worldwide. Addresses, phone numbers, and fax numbers are listed on the Cisco Website at

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Printed in the USA on recycled paper containing 10% postconsumer waste.

78-16313-01

Cisco uBR7246VXR User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

1 Cisco One-Year Limited Hardware Warranty Terms

2 Overview

Cisco uBR7246VXR Components

Card Slot and Logical Interface Numbering

3 Site Preparation

Site Environment

Temperature and Humidity Requirements

Power Guidelines

Power Connection Guidelines for DC-Powered Systems

Cabling Guidelines

Ethernet and Fast Ethernet Connections

Coaxial Cable Connections

4 Installing the Chassis

Rack-Mount Installation Guidelines

Workbench and Tabletop Installation Guidelines

Installation Tools and Equipment

Verifying Contents After Unpacking

Attaching the Rack-Mount Brackets

Attach the Rack-Mount Brackets to the Rear of the Chassis

Attach the Rack-Mount Brackets to the Front of the Chassis

Attach the Rack-Mount Brackets to the Middle of the Chassis

Installing the Cable-Management Brackets

Installing the Chassis in the Rack

Installing the Chassis on a Workbench or Tabletop

Connecting the Chassis to Ground

5 Connecting the Chassis to Power

AC Power Supplies

DC Power Supplies

Tools

Cabling

6 Powering on the Cisco uBR7246VXR Router

7 Troubleshooting the Installation

Identify Startup Problems

Other Troubleshooting Information Websites

8 Related Documentation

9 Obtaining Documentation and Submitting a Service Request