XKL muxponders are a combined transponder and a mux/demux housed a 1 rack unit  (1U) or 2 rack unit (2U) configuration. These systems enable customers to soft-configure the aggregation of services, including optical amplifiers for extending network reach, filters, protection solutions, and other optical components required for any optical network. Systems can be “stacked” using XKL Mux/Demux (DMD) solutions, enabling clients to scale the architecture as future bandwidth requirements dictate.