Product picture - Cisco SM-X-1T3 E3 1-Port Clear-Channel Packet-over-T3 E3 Service Module for Cisco Integrated Services Routers Cisco, SM-X-1T3, E3, 1-Port, Clear-Channel, Packet-over-T3, E3, Service, Module, Cisco, Integrated, Services, Routers Click the image to close this page