Safety Recommendations
Cisco AS5800 Universal Access Server Hardware Installation Guide2-14
When preparing your site for network connections to the access server, you should consider the
following:
•Type of cabling required (fiber, thick or thin coaxial, shielded twisted-pair, or unshielded
twisted-pair)
•Distance limitatio n s
•Cables needed for interface connections
•Any additional interface equipment needed, such as transceivers, hubs, switches, modems,
channel service units (CSUs), or data service units (DSUs)
•Cable pinouts (if you plan to build your cables)
Before installing the access server, have all additional external equipment and cables noted in the
documentation that ships with each component on hand. For ordering information, contact a
customer service r epresentative.
Safety Recommendations
This section provides safety guidelines to help you a v oid inj ury t o yourse lf and a v oid da mage to the
equipment. The following safety guidelines are recommended when working with any equipment
that connects to electrical power or telephone wiring:
•Locate the emergency power-Off switch for the room in which you are working be fore begi nning
any procedures requiring access to the chassis interior.
•Disconnect all power and external cables before moving a chassis.
•Never work alone if potentially hazardous conditions exist.
•Never assume that power has been disconnected from a circuit; always check.
•Never perform any action that creates a potential hazard to people or makes the e quipment
unsafe.
•Carefully examine your work area for possible hazards such as moist floors, ungrounded power
extension cables, and missing safety grounds.
•A 60A DC circuit breaker is recommended for the DC-input power source. This circuit breaker
should protect against short-circuit and overcurrent f aults in accordance with United States
National Electrical Code NFPA 70 (United States), Canadian Electrical Code, part I, C22.1
(Canada), and IEC 364 (other countries).
•Only a DC power source that complies with the safety extra -lo w voltage ( SELV) requirements in
UL1950, CSA 950, EN 60950, and IEC950 can be connected to the DC-input power supply .
•A readily accessible disconnect device must be incorporated in the fixed wiring.
•This unit is to be installed in a restricted access area in accordance with articles 110-16 , 110-17 ,
and 110-18 of the National Electric Code, ANSI/NFPA 70.
Warning Before opening the chassis, disconnect the telephone-network cables to avoid contact
with telephone-network voltages. T o see tran slat ion s of the warnin gs tha t a ppear in thi s publi cati on,
refer to the Cisco AS5800 Universal Access Server Regulatory Compliance and Safety Information
document that accompanied this device.