Preparing Your Site

• Place the system in a stable area free of excess movement and jarring.

• Install the system safely and keep the cables and cords out of the way.

• Make sure that the setup is comfortable for users.

• Allow room for proper cooling air flow.

• Place the system where it can be easily serviced (front and rear).

• Place the system in an area free of excess heat, dust, smoke, and electrostatic discharge (ESD).

Four internal, DC-powered fans cool the system's drives, cards, and power supplies in the front of the chassis. The fans are housed in a front-accessible fan tray.

To ensure adequate cooling:

• Provide at least 3 inches of space at the front and back of the system

• Ensure that all panels are in place

• Fill or cover all card slots with blank panels

• The total weight of the system chassis and peripherals (such as backup power devices and switches)

• The total weight of the support equipment (such as desks and file cabinets)

• Anticipated future additions or expansions

If power fails at a remote site, all connections to that remote site will be terminated unless otherwise protected. Generally, power failures in a remote office are more serious when network services are widely distributed. To protect against such failures, consider connecting one power system to the local power grid and the other to a UPS.

Observe the following general safety recommendations when installing and maintaining the Cisco ICS 7750:

• Never try to lift the chassis by yourself.

• Always unplug all power cords before installing or removing the chassis.

• Keep the chassis area clear and free of dust during and after installation.

• Keep tools and chassis components away from walk areas.

• Never wear loose clothing, jewelry (including rings and chains), or other items that could get caught in the chassis. Fasten your tie or scarf and roll up your sleeves.

Note   Refer to the Cisco ICS 7750 Hardware Installation Guide for comprehensive safety guidelines related to the installation and maintenance of the system.

• Ensure that your footing is solid, and balance the weight of the chassis between your feet.

• Never move suddenly or twist your body as you lift. Lift the chassis slowly.

• Keep your back straight and lift with your legs, not your back. If you must bend down to lift the chassis, bend at the knees, not at the waist, to reduce the strain on your lower back muscles.

• Always disconnect all external cables before lifting or moving the chassis.

Warning Two people are required to lift the chassis. Grasp the chassis underneath the lower edge and lift with both hands. To prevent injury, keep your back straight and lift with your legs, not your back. To prevent damage to the chassis and components, never attempt to lift the chassis with the handles on the power supplies or on the interface processors, or by the plastic panels on the front of the chassis. These handles were not designed to support the weight of the chassis.
Waarschuwing	Er zijn twee mensen nodig om het frame op te tillen. Het frame dient onder de onderste rand vastgegrepen en met beide handen omhooggetild te worden. Om te voorkomen dat u letsel oploopt, dient u uw rug recht te houden en met behulp van uw benen, niet uw rug, te tillen. Om schade aan het frame en de onderdelen te voorkomen, mag u nooit proberen om het frame op te tillen aan de handvatten op de voedingen of op de interface-processors of aan de kunststof panelen aan de voorkant van het frame. Deze handvatten zijn niet ontworpen om het gewicht van het frame te dragen.
Varoitus	Asennuspohjan nostamiseen tarvitaan kaksi henkilöä. Ota ote asennuspohjan alareunasta ja nosta molemmin käsin. Pitäen selkäsi suorana nosta jalkojen (ei selän) avulla, jotta välttäisit loukkaantumista. Älä yritä nostaa asennuspohjaa virtalähteen tai liitäntäprosessorin kahvoista tai asennuspohjan etuosan muovipaneeleista, jotta estät asennuspohjan ja rakenneosien vaurioitumisen. Näitä kahvoja ei ole suunniteltu kestämään asennuspohjan painoa.
Attention	l faut deux personnes pour soulever le châssis. Le saisir par son rebord inférieur et soulever des deux mains. Pour éviter tout trauma de la région lombaire, garder le dos droit et soulever la charge en redressant les jambes. Pour éviter d'endommager le châssis et ses composants, ne jamais tenter de le soulever par les poignées des blocs d'alimentation ou des processeurs d'interface, ni par les panneaux en plastique à l'avant du châssis. Ces poignées ne sont pas prévues pour supporter le poids du châssis.
Warnung	Zum Anheben des Chassis werden zwei Personen benötigt. Fassen Sie das Chassis unterhalb der unteren Kante an und heben es mit beiden Händen an. Um Verletzungen zu vermeiden, ist der Rücken aufrecht zu halten und das Gewicht mit den Beinen, nicht mit dem Rücken, anzuheben. Um Schäden an Chassis und Bauteilen zu vermeiden, heben Sie das Chassis nie an den Kunststoffabdeckungen vorne am Chassis oder mit den Griffen am Netzgerät oder an den Schnittstellenprozessoren an. Diese Griffe sind nicht so konstruiert, daß sie das Gewicht des Chassis tragen könnten.
Avvertenza	Il telaio va sollevato da due persone. Afferrare il telaio al di sotto del bordo inferiore e sollevare con entrambe le mani. Per evitare infortuni, mantenere la schiena diritta e sollevare il peso con le gambe, non con la schiena. Per evitare danni al telaio ed ai componenti, non provare mai a sollevare il telaio tramite le maniglie sugli alimentatori o sui processori di interfaccia oppure tramite i pannelli in plastica sulla parte anteriore del telaio. Queste maniglie non sono state progettate per sostenere il peso del telaio.
Advarsel	Det er nødvendig med to personer for å løfte kabinettet. Ta tak i kabinettet under den nedre kanten, og løft med begge hender. Unngå personskade ved å holde ryggen rett og løfte med bena, ikke ryggen. Unngå skade på kabinettet og komponentene ved å aldri prøve å løfte kabinettet etter håndtakene på strømforsyningsenhetene, grensesnittprosessorene eller i plastpanelene foran på kabinettet. Disse håndtakene er ikke beregnet på å tåle vekten av kabinettet.
Aviso	São necessárias duas pessoas para levantar o chassis. Agarre o chassis imediatamente abaixo da margem inferior, e levante-o com ambas as mãos. Para evitar lesões, mantenha as suas costas direitas e levante o peso com ambas as pernas, sem forçar as costas. Para prevenir danos no chassis e nos seus componentes, nunca tente levantá-lo pelas asas das unidades abastecedoras de energia, nem pelos processadores de interface, ou pelos painéis plásticos localizados na frente do chassis. Estas asas não foram criadas para suportar o peso do chassis.
¡Advertencia!	Se necesitan dos personas para levantar el chasis. Sujete el chasis con las dos manos por debajo del borde inferior y levántelo. Para evitar lesiones, mantenga la espalda recta y levántelo con la fuerza de las piernas y no de la espalda. Para evitar daños al chasis y a sus componentes, no intente nunca levantar el chasis por las asas de las fuentes de alimentación o de los procesadores de interfase, ni por los paneles de plástico situados en el frontal del chasis. Las asas no han sido diseñadas para soportar el peso del chasis.
Varning!	Det krävs två personer för att lyfta chassit. Fatta tag i chassit under den nedre kanten och lyft med båda händerna. För att undvika skador skall du hålla ryggen rak och lyfta med benen, inte ryggen. Chassit och delarna kan skadas om du försöker lyfta chassit i handtagen på strömförsörjningsenheterna eller gränssnittsprocessorerna, eller i plastpanelerna på chassits framsida. Handtagen är inte konstruerade för att hålla chassits tyngd.

• Locate the emergency power-off switch for the room in which you are working before beginning any procedures requiring access to the chassis interior.

• Disconnect all power and external cables before installing or removing a chassis.

• Work with at least one other person when potentially hazardous conditions exist.

• Always verify that power has been disconnected from a circuit.

• Do not perform any action that creates a potential hazard to people or makes the equipment unsafe.

• Carefully examine your work area for possible hazards such as moist floors, ungrounded power extension cables, and missing safety grounds.

In addition, follow these guidelines when working with any equipment that is disconnected from a power source but still connected to telephone wiring or other network cabling:

• Do not work on the system or connect or disconnect cables during periods of lightning activity.

• Never install telephone jacks in wet locations unless the jack is specifically designed for wet locations.

• Never touch uninsulated telephone wires or terminals unless the telephone line has been disconnected at the network interface.

• Always use caution when installing or modifying telephone lines.

Follow these guidelines to prevent ESD damage:

Caution Do not use extension cords to hook the system or any of its associated components to a power source. Extension cords are intended for use only with low-voltage appliances. Use of extension cords with the system can result in equipment or property damage.

The Cisco ICS 7750 chassis, console, and some other peripherals use shielded cables. You can successfully use shielded cables for communication over extended distances. However, reliable communication over cables longer than 50 ft depends on electrical noise, correct ground potentials at termination points, and other variables.

While exploring the cabling design, consider the following issues:

• Labels. The extent and accuracy of the labeling on network equipment and cables affects your ability to implement and test enhancements to the network. Ensure that labels are easy to read and accessible.

• Cross-campus network connections. In a campus (multiple-building) environment, document the connections between buildings, including the number of pairs of wires and the type of wiring (or wireless technology) in use.

• Internal cabling. Within buildings, concentrate on locating telecommunications wiring closets, cross-connect rooms, and laboratories or computer rooms. Gather information about the type of cabling that runs between these types of facilities.

• Do not run signal cables parallel to AC power cables if they are within 4 in. of each other.

• Do not install signal cables close to electric motors, power-line regulators, relays, or power supplies.

• Avoid laying signal cables close to air conditioners, copy machines, water coolers, and other similar equipment that generates power-line noise.

• Do not run signal cables near equipment that generates radio frequency interference, such as radio transmitters.

• Do not expose cables to moisture or heat. If you install signal cables outdoors, use a conduit or raceway to protect them from lightning and other weather.

• Allow for the presence of heavily traveled railroad tracks or highways, which can potentially disturb cables between buildings. Avoid construction or manufacturing areas where heavy equipment or digging could result in cable breakages.

• If cabling needs to cross a public street or property owned by other companies, consult with legal experts concerning right-of-way issues.

• Use shielded cable to ensure radio frequency compatibility.

• Use the shortest possible cable between system processing engine (SPE) cards and peripherals.

• To ensure maximum protection for equipment and operators, examine the protective grounds at each power outlet to make sure that they are adequate.

• Protect external interconnecting cables from physical damage without endangering users. Install the cables under a raised floor if possible.

• Avoid tight cable pulls against sharp edges.

Caution To avoid damaging equipment or components during cabling, unplug all other devices in the system before you begin with the installation of any additional units.

• Signal type

• Signal speed

• Transmission medium

The distance and rate limits referenced in the following sections are the IEEE-recommended maximum speeds and distances for signaling purposes. You should use this information as a guideline in planning your network connections.

• Wires can run in the open along baseboards, ceiling mouldings, or door and window casings or concealed inside floor conduits that travel between distribution frames and jacks.

• National and local building codes specify the types of telephone wire that you can run in each type of ceiling.

• Cables that run vertically should run inside a wall, pole, or similar facility for vertical wire drops.

Caution Data degradation can occur if wires travel near strong EMI sources. (See "Electromagnetic Interference Considerations" for additional information.)

Protect the equipment against EMI to help ensure correct operation of the system. There should not be any X-ray equipment, hand-held transceivers, or microwave, radio, or television transmitters in the equipment room.

Strong EMI, especially when caused by lightning or nearby radio transmitters, can destroy the cards or other components in the Cisco ICS 7750 and even create an electrical hazard by conducting power surges through power lines into installed equipment.

Note   To prevent or remedy interference problems, you may need to consult electromagnetic compatibility (EMC) experts.

If signal wires exceed recommended cabling distances, or if signal wires pass between buildings, you should give special consideration to the effect that a lightning strike in your vicinity might have on electrical equipment.

The electromagnetic pulse (EMP) generated by lightning or other high-energy phenomena can drive enough energy into conductors to damage or destroy electronic equipment. If you have experienced such problems, you should consult with EMC experts to ensure that you have adequate electrical surge suppression and shielding of signal cables in your Cisco ICS 7750 operating environment.

Table 2-6: Site Planning Tasks

Task No.	Planning Activity	Verified By	Date	Time
1	Space evaluation:
	Space and layout
	Floor covering
	Impact and vibration
	Lighting
	Maintenance access
2	Environmental evaluation:
	Ambient temperature
	Humidity
	Altitude
	Atmospheric contamination
	Airflow
3	Power evaluation:
	Input power type
	Receptacle proximity to the equipment
	Dedicated (separate) circuits for redundant power supplies
	UPS for power failures
4	Grounding evaluation:
	Circuit breaker size
5	Cable and interface equipment evaluation:
	Cable type
	Connector type
	Cable distance limitations
	Interface equipment (transceivers)
6	EMI evaluation:
	Distance limitations for signaling
	Site wiring
	RFI levels