EX-SFP-1GE-LX-BCC | Juniper Compatible 1GB Single-Mode 10km (1000BASE-LX)

Q: Will this work in place of the Juniper EX-SFP-1GE-LX?
A: Yes. The EX-SFP-1GE-LX-BCC is built to the same 1000BASE-LX standard (IEEE 802.3z), uses the same SFP form factor, operates at the same 1.25 Gbps data rate, and transmits at the same 1310 nm wavelength over single-mode fibre. It is plug-and-play compatible and will initialize and perform identically to the Juniper original in any platform that lists EX-SFP-1GE-LX as a supported transceiver.

Q: Which Juniper platforms support this transceiver?
A: This module is compatible with Juniper EX Series switches, SRX security gateways, MX routers, QFX fabric switches, and ACX universal access routers that feature SFP slots and list 1000BASE-LX support. Any Juniper platform with an SFP interface that accepts the EX-SFP-1GE-LX will accept this compatible module. Consult your platform's hardware compatibility tool or datasheet to confirm SFP support.

Q: What type of fibre and patch cables do I need for 10 km reach?
A: You need G.652 standard single-mode fibre (9 micron core) with LC duplex connectors. The 10 km reach specification assumes typical single-mode fibre attenuation of approximately 0.5 dB per km at 1310 nm and standard LC connector insertion loss. Multimode fibre is not supported for this transceiver. Actual reach depends on the optical power budget, fibre quality, number of splices, and connector condition.

Q: Can I access DOM diagnostic data from my network operating system?
A: Yes. This transceiver implements Digital Optical Monitoring per the SFF-8472 MSA standard. Junos CLI commands such as 'show interfaces diagnostics optics' will display real-time transmit power, receive power, temperature, bias current, and voltage. This allows you to monitor link margin, detect failing transceivers before outages occur, and verify optical power levels during troubleshooting without external test equipment.

Q: Does this transceiver support autonegotiation or require manual speed configuration?
A: 1000BASE-LX is a fixed-rate physical layer standard operating at 1.25 GBd. The transceiver does not autonegotiate speed like 1000BASE-T copper interfaces. The host port must be configured for 1000 Mbps full-duplex operation. Most Juniper platforms auto-detect SFP module type and apply the correct speed and duplex settings, but you should verify port configuration matches the installed optic to avoid link failures.