ATM Cell Traffic Flow in the 9A656-04
CTM (Cell Transfer Matrix) ASICs
The 9A656-04 has seven CTM ASICs that provide two interfaces each between the TDM Bus and the CTM Backplane located in the SmartSwitch 9500 chassis. Each interface is a full-duplex connection with a raw throughput capacity of 2 Gbps. In addition, the CTM ASICs perform all trafÞc management between the 9A656-04 and the CTM backplane.
Utopia (Universal Test and Operation Physical Interface) ASICs
The 9A656-04 has four Utopia ASICs whose role is to process ATM cells from the ANIMs to the TDM Bus, and vice versa. In addition, the Utopia ASICs are responsible for performing path lookups and outbound header translation.
i960HD Processor
The i960HD processor, working with the Þve types of ASICs deÞned earlier, is responsible for distributed management functions, signalling, SNMP management and serving as the in-band management LAN Emulation Client (LEC) for the module. The i960 also supports out-of-band management interfaces.
