The Zy XEL transceiver family follows industry standards to ensure compatibility with switches from other makers without the proprietary technology concerns. Zy XELs transceiver family is specifically designed for high-performance integrated duplex data links over single- or multi-mode optical fiber. Through utilizing different wavelengths, a single fiber can accommodate two-way transmissions. The bi-directional fiber transceivers can immediately expand transmission capacity without running new fiber, saving a significant portion of installation costs & maximizing the value of existing fiber plants. The independent transceiver design provides the highest flexibility for network maintenance tasks. Unlike switches, transceivers can be added only when really needed; infrastructure upgrade & transceiver repair can also be performed easily by just replacing the transceiver instead of the whole device.