The Cisco 15305-E3T3-3 Service Module is a three-port E3/T3 service module designed for the Cisco ONS 15305 optical transport system, delivering three 75-ohm E3/T3 interfaces to extend line capacity within the chassis. Its part number is 74-4235-01, and the module is specifically identified as 15305-E3T3-3, ensuring compatibility with the ONS 15305 platform. Use this module to add dedicated E3/T3 transport channels in a Cisco ONS 15305 deployment, enabling scalable, modular expansion of your network's interoffice transport capacity.
