Cisco WS-X4604-GWY - VoIP Gateway Especificaciones descargar pdf (Pagina 38)

Chapter 2 Campus Infrastructure Considerations

Power Protection Strategies

2-4

Cisco IP Telephony Network Design Guide

78-11103-03

Power Protection Strategies

Reliable power is vital to IP telephony. An uninterruptible power supply (UPS)

can be used to ensure a reliable and highly available infrastructure by protecting

it from power failures. Each UPS has some amount of battery that will keep the

equipment running for a certain period of time. The UPS can be configured with

the appropriate amount of battery for desired results.

Caution Cisco strongly recommends that you provide some type of backup

power for your IP telephony network. Cisco AVVID products do not

ordinarily come with a backup power supply.

Here are some common strategies for using UPS:

• Back up the wiring closet switches and downstream data center using UPS.

While this strategy ensures that power is maintained to the phones, wall

powered devices such as PCs can still go down.

• Back up the whole building using UPS. This protects all devices and

equipment from power failures. Protecting PCs in this fashion is useful

because of the new breed of highly available data applications.

• Provide a separate generator for power (besides the feed from the utility

company) and use it as backup. In this case you might still need to add UPS

because it usually takes a few minutes for the generator to ramp up. The

advantage of this strategy is that less battery time is needed for each UPS.

In addition, UPS can be configured with options such as Simple Network

Management Protocol (SNMP) management, remote monitoring, alarm reporting,

and so on.

Further Information

For more information on power protection, see the “Additional Information”

section on page xvii.

1 2 ... 33 34 35 36 37 38 39 40 41 42 43 ... 261 262

Sin comentarios

Cisco WS-X4604-GWY - VoIP Gateway Especificaciones Pagina 38