Cisco WS-X4604-GWY - VoIP Gateway Especificaciones descargar pdf (Pagina 54)

Chapter 2 Campus Infrastructure Considerations

Power to IP Phones

2-20

Cisco IP Telephony Network Design Guide

78-11103-03

Wall Power

The last option is to power the Cisco IP Phone from a local transformer module

plugged into a nearby outlet (maximum of 3 meters), as illustrated in Figure 2-9.

Figure 2-9 Wall Powered Cisco IP Phone

A combination of these power options can provide redundant power to the

Cisco IP Phone. Internally, these three sources are combined through protection

diodes, so that whatever combination is used, the phone shares the power.

Summary of Recommendations

You can purchase line cards that are capable of applying power to the IP phone.

If you want to deploy IP phones with existing switches, you can either buy new

line cards capable of applying power or use the external Cisco power patch panel

to power the phones if powered line cards are not available for the switch. As a

final option, you can use wall power to provide power to the IP phones.

source

110 VAC wall

power to 48VDC

converter

40778

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Cisco WS-X4604-GWY - VoIP Gateway Especificaciones Pagina 54