The Cisco SM-X-1T3/E3 1-Port Clear-Channel Packet-over-T3/E3 Service Module for Cisco Integrated Services Routers allows you to switch between T3 and E3 applications with a single Cisco IOS software command. This feature offers you increased flexibility and investment protection by allowing a Cisco partner, service provider, or enterprise customer to stock only a single product that can be deployed internationally.

The module provides an integrated line interface unit (LIU) DSU that allows T3 or E3 lines to be directly terminated on a Cisco router, eliminating the need for external DSU equipment, simplifying the T3/E3 line management, reducing provisioning cost, and freeing valuable rack space. It supports the proprietary subrate and scrambling features of T3 DSU vendors such as Digital Link, Larscom, and ADC Kentrox. Subrate support in the module maximizes the utility of these products in service provider environments. By simultaneously supporting interoperability with a wide range of third-party DSU vendors, this module offers the flexibility to support installed equipment without locking customers into a proprietary solution.

The Cisco T3/E3 Service Module provides direct connectivity to a T3 line for full-duplex communications at the T3 rate of 44.736 MHz and full-duplex E3 communications at 34.368 MHz. It provides the performance requirements to deploy advanced voice, video, and data applications over the WAN and supports key Cisco IOS Software features and services such as quality of service (QoS), Network-Based Application Recognition (NBAR), IP Security (IPsec), Firewall, intrusion detection system (IDS), Network Address Translation (NAT), and NetFlow. The service module supported in all Cisco IOS software feature sets, and does not require additional memory.