Cisco ASR 903 Hardware Installation Guide

48-Port T3/E3 CEM Interface Module
The 48-port T3/E3 interface module provides connectivity for up to 48 T3/E3 ports through 3 high-density
connectors on the front panel (see the figure below ). Each port supports 16 TX and RX ports. For information
on LEDs, see Interface Module LEDs.
Figure 27: 48 x T3/E3 Interface Module
Figure 28: 48-port T3/E3 Faceplate
For information on supported SFP modules, see Cisco ASR 900 Series Aggregation Services Routers Data
Sheet.
For more information about installing an optical interface module, see Interface Module Installation.
4-port OC3/STM-1 (OC-3) or 1-port OC12/STM-4 (OC-12) Interface Module
The 4-port OC3/STM-1 (OC-3) or 1-port OC12/STM-4 (OC-12) interface module can operate as up to four
STM-1 interfaces. The figure below shows the interface module.
Cisco ASR 903 Aggregation Services Router Hardware Installation Guide
37
Cisco ASR 903 Router Overview
Interface Modules

Cisco ASR 903 Specifications

General

Brand	Cisco
Model	ASR 903
Category	Network Router
Language	English