DataLink Modems

DataLink modems were available as 1200 or 2400 baud internal cards for the II+, IIe and IIgs, or as an external 2400 baud.
Manuals & files
Opens on ae.applearchives.com (not rehosted here).
Source page: https://ae.applearchives.com/all_apple_iis/datalink_modems/
DataLink 2400
Datalink 2400 - alternate
DataLink Express