Cisco GLC-BX-D

The Cisco GLC-BX-D is a Small Form-Factor Pluggable (SFP) transceiver module designed for use with Cisco networking equipment. It is part of the Cisco 1000BASE-BX10-D family of SFP modules. The GLC-BX-D operates on a single strand of standard single-mode fiber optic cable and provides a Gigabit Ethernet connection. It has a maximum data transfer rate of 1.25 Gbps and a maximum link distance of up to 10 kilometers (6.2 miles). The "BX" in the model name refers to the BiDi (Bidirectional) technology used by the module. It allows for bidirectional communication over a single strand of fiber by using different wavelengths for transmitting and receiving data. The "D" in the model name indicates that it is the downstream module in a bidirectional link, while the corresponding upstream module is the GLC-BX-U. Overall, the Cisco GLC-BX-D is used to provide high-speed network connectivity over long distances in Cisco networking environments.