Cisco PA-A3-OC3SML 155.52Mbit/s networking card

1-port ATM OC-3/STM-1 single-mode (LR) port adapter The enhanced asynchronous transfer mode (ATM) port adapters (ATM PA-A3) are single-port, single and dual-wide ATM port adapters for the Cisco 7200, 7500, and 7600 OSR series routers using the FlexWAN module for the Cisco Catalyst 6000 family of switches. The ATM PA-A3 is designed with a high-performance, dual segmentation and reassembly (SAR) architecture with local buffer memory.