We have a B8155 on version 114.013.002.21400 and I could swear the firmware page for the product lists service packs available for download. When attempting to install the latest service pack (AltaLink B8145/B8155 Service Pack (R22-08)) via the webpage, it gives me an error saying:
'Error Processing Upload Request'
And that's it. Is the firmware jump too big? Is the service pack just not applicable? The error message isn't exactly super detailed.