7-6CHAPTER 7: REDUNDANCY IN THE COREBUILDER 7000 FAMILY ATM SWITCH

Table 7-3Required Power Supply for Various Installations (continued)

CB7000 Switching Card

Single 90A

Single 90A

3

X 7436 ATM Interface Cards

 

 

 

 

ATM Data Center with high-density Fast Ethernet

 

 

 

 

CB7000HD Switching Card

Single 90A

Single 90A

1

X 7600F ATM Interface Card

 

 

3*8 port ATM Interface Cards

 

 

 

 

 

CB7000HD Switching Card

Single 90A

Single 90A

1

X 7600T ATM Interface Card

 

 

3*8 port ATM Interface Cards

 

 

 

 

 

Other applications

 

 

 

 

 

￿CB7000 Switch Card

Single 90A

Single 90A

4

X 7262 Ethernet/ATM Interface Card

 

 

 

 

 

 

Providing Redundancy for Various Power Loads

This section describes when redundant switch cards and redundant power supplies can be used in a CoreBuilder switch.

In order to determine whether a redundant switch card and/or an redundant power supply can be used in a CoreBuilder switch, the total power consumption of all installed cards must be examined. According to the total power consumption, there are three possibilities, as the following examples illustrate:

Installation I: The total power consumption of a single switching card (that is, no redundant card installed) and all interface cards exceeds 90A. In this case, a Dual 90A supply is required so that the second power supply cannot be redundant. A redundant switch card can be installed. This “heavy load” installation is illustrated by the first example installation in Table 7-3.

Installation II: The total power consumption of two switching cards (i.e., redundant card installed) and all interface cards exceeds 90A but without the second switching card the consumption is less than 90A. In this case, either a redundant switch card or a redundant power supply can be installed, but not both. This “medium load” installation is illustrated by the second example installation in Table 7-3.

Installation III: The total power consumption of two switching cards and all interface cards does not exceed 90A. In this case, both a redundant switch card and a redundant power supply can be installed.

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3Com DUA3700-0BAA04 manual ATM Data Center with high-density Fast Ethernet, Other applications

DUA3700-0BAA04 specifications

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