FS1048e 100Mbps capable transceiver

Forum|Forum|11 months ago
August 25, 2025
6 replies
1054 views

We are migrating our network infrastructure to FS1048e switches. We have some legacy equipment that refuses to communicate at a port speed of 1Gbps. The transceivers we are currently using are FN-TRAN-GC. Copilot suggested FN-TRAN-SFP+GC, but the website it referenced is a third party site that doesn't give me much confidence in its accuracy. Our requirements for the transceiver are an RJ-45 connector, compatible with the FS1048e that can operate at a speed of 100Mbps. Has anyone else run into a similar need and found a working transceiver for the FS1048e?

FortiSwitch

Best answer by AEK

Then I think your solution is one of the following :

Make the required changes to the connected legacy equipment so it can operate at 1Gb
Put an intermediate device between FSW and the legacy equipment, like an intermediate switch, that support 1Gb from one side and 100Mb from the other side

AEK

SuperUser

I think FN-TRAN-GC is the one you are looking for.
https://www.fortinet.com/content/dam/fortinet/assets/data-sheets/Fortinet_Transceivers.pdf

AEK

DisitcoAuthor

Visitor III

Thanks, but FN-TRAN-GC is the transceiver that we already have and it won't do 100Mbps. Unless it has to be set in the CLI and just can't be set through the webadmin page or through auto-negotiate?