Used Cisco Optical Services Module (OSM)

Part # OSM-1CHOC12/T3-SI

Product Description: Cisco 7600 Series - 1-Port CHOC-12/CHSTM-4 OSM, to T3/E3, SM-IR, with 4 GE.

About the Cisco 7600 Series: "Routing solutions for optical metropolitan area networks and WANs. Up to 720 Gbps switching fabric. 32,000 PPPoE connections, 16,000 L2TP connections, and 16,000 SSG connections per MWAM module" (Cisco - A Beginner's Guide Third Edition by Velte & Velte).

Cisco 7600 Optical Services Modules
Cisco Routers - Part Numbers Listed Alphabetically