This SFP fibre module is hot-swappable, making upgrades and replacements seamless by minimizing network disruptions. For use in the SFP ports of the J9263A 6600-24G Switch, the J9264A 6600-24G-4XG Switch, and the J9451A 6600-48G Switch Hi Temp warnings will trigger at lower temperatures (~50C)if Commercial Temp vs Industrial Temp transceivers (~70C) are used. All Third Party transceivers are treated as Commercial Temp, regardless of capability. All in all: a 2930F on one side with a J4858D ina SFP+ slot, a 2930M on the other side with a J4858D ina SFP slot, approx 300 meters of OM3 fiber, will it work at 1G? Specifically if you are using a 1GB MX (Multimode) SFP your distance is limited to 100m (330ft). You could be using the best quantum designed military grade fiber in the world and your distance limitation is still based on the timing characteristics of the MAC layer definition.

Only supported for use in the SFP⁠+ ports on R0X43A module. 100FX is not supported for use in the R0X44A SFP28 or SFP56 ports of any other 6400 module. JL687A 32p 25G module requires configuration of "interface groups" (groups of 4 ports) to enable use of 1G or 10G transceivers or DACs in the SFP28 ports (default is to use 25G transceivers / DACs). See the For J8705A and J8706A modules: K.12.01 (for J9054B/C 1990-3613); K.15.08.0007 (for J9054C 1990-4112 and 1990-4483) J9054D: K.15.08.0007For J9310A, J9311A: K.14.50 (for J9054B/C 1990-3613); K.15.08.0007 (for J9054C 1990-4112 and 1990-4483, and J9054D) The 8360 32Y4C and 48Y6C models require configuration of "interface groups" only for ports 1-4 (as group #1) to enable the use of 10G transceivers / DACs in the SFP28 ports (Interface Groups default to 25G speed). Ports 1-4 on the 8360 32Y4C model do not support 1G transceivers.

For sure at the very same maximum distance capable when using tested OM2 MMF cables (50/125 um 850 nm), so up to 550 meters. Because they're using the entire width of the fiber, they "bounce" from "top to bottom" as you see in the picture. Modes traveling at the boundaries of the fiber travel faster, and modes traveling at the center travel a little bit slower. If you look at the picture where it says "Dispersion" you see that they don't quite arrive at the same time, this is a very very minute amount of time, however its enough to reduce bandwidth.JL253A, JL254A, JL255A, JL256A, JL258A, JL263A, JL264A, JL259A, JL260A, JL261A, JL262A, JL557A, JL558A, JL559A

For J9537A, J9549A, J9535A, and J9637A modules: K.15.02.0004 (for J9054B/C 1990-3613); K.15.08.0007 (for J9054C 1990-4112 and 1990-4483) J9054D: K.15.08.0007 The 8325 requires configuration of "interface groups" (groups of 12 ports) to enable use of 1G or 10G transceivers or DACs in the SFP28 ports (default is to use 25G transceivers / DACs). See the For use in the JL075A SFP⁠+ ports. Also used in an installed JL083A Aruba 3810M/2930M 4SFP⁠+ MACsec Module. This is called modal dispersion, it's an inherent property of multimode fiber - it's basically the relationship between distance and bandwidth. A 300 meters run, especially deployed with OM3 MMF, should be an easy run for two J4858D so I believe you can expect 1Gbps Full Duplex without issues if optical cabling and patches is correctly deployed, tested and so certified.Not supported for use in the following 3800 models: J9573A, J9574A, J9575A, and J9576A. The SFP⁠+ ports do not support 100M operation. The 2930F Switch Series models with 1G/10G SFP⁠+ ports added support for this J9054C/J9054D 100FX transceiver. The J9054C/J9054D are supported in models with 1G SFP ports. R0X44C has the added feature of enabling the bottom ports to accept a 50G product, and in this mode, will NOT accept these 1G transceivers(see 50G SFP56 chapter). For use in the SFP ports of the 2530 Series Switches. (The J9853A, J9854A, J9855A, and J9856A models have 1G/10G SFP⁠+ ports that do not support these 100Mbps transceiver modules.)