3Com 5000 ATM manual Nni

Sample ATM Backbone SwitchModule Configurations 1-11

Dual-HomingFigure 1-5 illustrates the dual-homing configuration of an ATM Configuration Backbone SwitchModule with a redundant ATM OC-3 card.

ATM Backbone

SwitchModule

Primary

ATM OC-3

LECs 1 to 64

Ethernet or FDDI SwitchModule

Redundant ATM OC-3 LECs 1 to 64

ELANs 1 to 64

ATM Switch A

NNI

ELANs 1 to 64

ATM Switch B

Figure 1-5Example Dual-Homing Configuration

If the loss of light, frame, or cell delineation is detected, the redundant ATM OC-3 card becomes active and the primary ATM OC-3 card is disabled.