Cisco SFP-10G-BX40U-I= 10GBASE-BX40-U Bidirectional Transceiver Module for 40km

The Cisco SFP-1G-BX4D-I and SFP-1G-BX4U-I SFPs operate on a single strand of standard SMF.

A SFP-1G-BX4D-I device is always connected to a SFP-1G-BX4U-I device with a single strand of standard SMF with an operating transmission range up to 4 km.

The communication over a single strand of fiber is achieved by separating the transmission wavelength of the two devices. SFP-1G-BX4D-I transmits a 133-nm channel and receives a 127-nm signal. The SFP-1G-BX4U-I transmits at a 127-nm wavelength and receives a 133-nm signal.

The SFP-1G-BX4D-I and SFP-1G-BX4U-I SFPs support digital optical monitoring (DOM) functions according to the industry-standard SFF-8472 multisource agreement (MSA). This feature gives the end user the ability to monitor real-time parameters of the SFP, such as optical output power, optical input power, temperature, laser bias current, and transceiver supply voltage.