- 2 x XFP
- plug-in module
- with Cisco Distributed Forwarding Card DFC-3C
- for Cisco 7603-S
The ES Plus line card also includes synchronization circuitry enabling them to provide standards-based functions for delivering and deriving transport-class network timing, enabling support of network-synchronized services and applications such as mobile backhaul and time-division multiplexing (TDM) migration.