It could take up to 15 seconds for the “Loading…” icon to disappear and for the plugin to load your Grandstream GXP2170 IP Phone 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.