Cisco ASR 902 Hardware Installation Manual page 26

Overview
Interface Modules
The figure below shows the 4-port OC-3 interface module.
Figure 17: 4-port OC-3 Interface Module
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 the Interface Module Installation.
For more information about using the LEDs to troubleshoot the Cisco ASR 902 Router, see Troubleshooting.
Cisco ASR 902 and ASR 902U Aggregation Services Router Hardware Installation Guide
26