It could take up to 15 seconds for the “Loading…” icon to disappear and for the plugin to load your 3Com 5500G-EI Switch Manual.
In case you’re either on 4G, LTE or 5G it should load quick. Once done, if you want to set up a default PDF reader on your computer for reading it, but don’t know how, check out our tutorial on how to set a default PDF reader.