Observe the following general precautions when using and working with your chassis:

• Keep your system components away from radiators and heat sources, and do not block cooling vents.

• Do not spill food or liquids on your system components, and never operate the product in a wet environment.

• Do not push any objects into the openings of your system components. Doing so can cause fire or electric shock by shorting out interior components.

• Position system cables and power supply cable carefully. Route system cables and the power supply cable and plug so that they are not stepped on or tripped over. Ensure that nothing is rests on your system component cables or power cable.

• Do not modify power cables or plugs. Consult a licensed electrician or your power company for site modifications. Always follow your local and national wiring rules.

• If you turn off your system to avoid damage to the system components, wait at least 30 seconds before turning it on again.

Use the following checklist to carry out all site planning tasks:

• The site meets environmental requirements.

• The site’s air conditioning system can compensate for the heat dissipation of the chassis.

• The floor space that the chassis occupies can support the weight of the system.

• Electrical service to the site complies with the safety with electricity requirements.

• The electrical circuit servicing the chassis complies with the power supply requirements.

• Console port wiring and cabling limitations have been considered in accordance to TIA/EIA-232F.

• The chassis Ethernet cabling distances are within prescribed limits.

• The equipment rack where the chassis is to be installed complies with prescribed requirements.

• The following factors have been carefully considered when selecting rack: location, safety, ease of maintenance, and proper airflow.

The Cisco ASR 907 Router has specific power and electrical wiring requirements. Adhering to these requirements ensures reliable operation of the system. Follow these precautions and recommendations when planning your site power for the Cisco ASR 907 Router:

• The redundant power option provides a second, identical power supply to ensure that power to the chassis continues uninterrupted if one power supply fails or input power on one line fails.

• In systems configured with the redundant power option, connect each of the two power supplies to a separate input power source. If you fail to do this, your system might be susceptible to total power failure due to a fault in the external wiring or a tripped circuit breaker.

• To prevent a loss of input power, be sure that the total maximum load on each circuit supplying the power supplies is within the current ratings of the wiring and the breakers.

• 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 to avoid personal injury and damage to the equipment due to lightning striking power lines or due to power surges. The chassis ground must be attached to a central office or other interior ground system.

Caution

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.

Note

The Cisco ASR 907 Router installation must comply with all the 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 central office or other interior ground system must be made with a 6 AWG gauge wire, copper ground conductor at a minimum.

The maximum power draw of the Cisco ASR 907 Router chassis and its configurable hardware components are listed in the following table. The maximum power draw values are not affected by whether the router chassis contains two or thress power supplies and either AC or DC.

This section contains guidelines for wiring and cabling at your site. When preparing your site for network connections to the chassis, consider the type of cable that is required for each component and cable limitations. Consider the distance limitations for signaling, electromagnetic interference (EMI), and connector compatibility. Possible cable types are fiber, thick or thin coaxial, foil twisted-pair, or unshielded twisted-pair cabling.

Also, consider any additional interface equipment that you need, such as transceivers, hubs, switches, modems, channel service units (CSU), or data service units (DSU).

Before you install the chassis, have on hand all additional external equipment and cables. For information about ordering, contact a Cisco customer service representative.

The extent of your network and the distances between the network interface connections depend, in part, on the following factors:

• Signal type
• Signal speed
• Transmission medium

The distance and rate limits that are referenced in the following sections are the IEEE-recommended maximum speeds and distances for signaling purposes. Use this information as a guideline when planning your network connections before installing the chassis.

If wires exceed the recommended distances, or if wires pass between buildings, give special consideration to the possibility of a lightning strike in your vicinity. The electromagnetic pulse due to lightning or other high-energy phenomena can easily couple enough energy into unshielded conductors to destroy electronic devices. If you have had problems of this sort in the past, you may want to consult experts in electrical surge suppression and shielding.

You need the following tools and equipment to install and upgrade the device and its components:

• ESD-preventive cord and wrist strap

• Antistatic mat or antistatic foam

• Number 1 and Number 2 Phillips-head screwdrivers

• #12-24 pan-head screws to secure the device to the equipment rack

• Cables for connecting to network ports (based on the configuration)

• Ethernet hub, switch, or PC with a network interface card for connecting to the Ethernet ports

• Console terminal that is configured for 115200 baud, 8 data bits, no parity, no flow control, and 2 stop bits

• Console cable for connecting to the console port

• Ratcheting torque screwdriver with a Phillips head that exerts up to 30-pound force per square inch (0.02-kilograms force per square millimeter (kgf/mm2)) of pressure

• Crimping tool as specified by the ground lug manufacturer

• Wire-stripping tools for stripping both 6 and 14-AWG wires

• Tape measure and level

• Ratcheting torque screwdriver with a Phillips head that exerts up to 15 inch-pounds (1.69 newton meters) of torque for attaching the ground wire to the device

This section illustrates how the building that houses the chassis must be properly grounded to the earth ground.

This section illustrates how to prepare yourself before removing the chassis from the sealed antistatic bag. The figures show how to wear the ESD strap around the wrist and how to connect the other end of the strap to the ground. ESD wrist straps are the primary means of controlling static charge on personnel.

Note: These images are for only representation purposes. The chassis' actual appearance and size would vary.