EX-SFP-GE40KT13R15-BCC | Juniper Compatible 1GB Single-Mode 40km (1000BASE-BX40-U) Industrial

Q: Will this work in place of the Juniper EX-SFP-GE40KT13R15?
A: Yes. This transceiver is coded and tested for drop-in compatibility with the EX-SFP-GE40KT13R15. It meets the same 1000BASE-BX40 standard, uses the SFP form factor, operates at 1.25 Gbps, and delivers the same 1310 nm TX / 1550 nm RX wavelength pair over 40 km of single-mode fibre. It will initialize plug-and-play in any Juniper platform that accepts the OEM part.

Q: Which Juniper platforms support this transceiver?
A: This transceiver works in Juniper switches and routers with SFP slots that support 1000BASE-BX operation, including EX Series switches, MX Series routers, and platforms requiring BiDi uplink transceivers. Verify your specific platform documentation lists EX-SFP-GE40KT13R15 support or 1000BASE-BX capability before deployment.

Q: Why must I use this with a specific paired transceiver, and which one?
A: BiDi transceivers use WDM to send and receive on different wavelengths over a single fibre. This uplink module transmits at 1310 nm and receives at 1550 nm. The far end must use the inverse wavelengths: 1550 nm TX and 1310 nm RX, such as the Juniper EX-SFP-GE40KT15R13. Mismatched wavelengths prevent link establishment because the receiver cannot detect the transmitter's signal.

Q: How do I access DOM data, and what parameters can I monitor?
A: DOM data is accessible via the I2C two-wire serial interface defined in SFP MSA. Your network operating system (Junos CLI, for example) queries the transceiver's onboard memory to retrieve real-time parameters: temperature (°C), supply voltage (V), laser bias current (mA), transmit optical power (dBm), and receive optical power (dBm). Use this data to identify marginal links, failing lasers, or fibre degradation before outages occur.

Q: What is the minimum acceptable receive power at 40 km, and how does fibre quality affect reach?
A: The transceiver's receiver sensitivity and the 17 dB optical budget define maximum reach. Actual distance depends on fibre attenuation (typically 0.35 dB/km for G.652 SMF at 1310 nm), splice loss, connector loss, and any inline passive components. Poor fibre quality, excessive bends, dirty connectors, or additional splices reduce the power budget and may limit usable distance below the 40 km rating. Measure end-to-end loss and confirm received power is above sensitivity threshold using DOM before declaring a link operational.