Cisco Cisco MGX-FRSM-HS2 B Serial Frame Service Module

The Cisco SM-X-1T3/E3 1-port T3/E3 enhanced service module (SM-X) is a software-configurable 
T3/E3 product for Second Generation Integrated Services Routers (ISR G2) and the Cisco 4451-X 
Integrated Services Router. This flexible enhanced service module enables you to switch between T3 and 
E3 applications with a single Cisco IOS command.

The SM-X-1T3/E3 enhanced service module supports a single-port T3 or E3 with an integrated channel 
service unit (CSU) and a data service unit (DSU). It supports High-Level Data Link Control (HDLC), 
PPP, and Frame Relay. The SM-X-1T3/E3 includes the following features:

Single port—universal T3/E3 version

Clear and subrate support in both T3 and E3 modes

Online insertion and removal (OIR) support

Onboard processing of Cisco Message Definition Language (MDL) and performance monitoring

Support for scrambling and subrate can be independently or simultaneously enabled in each DSU 
mode

Support for full T3 and E3 line rates

Support for RFC1407–MIB