This is not a SFW instance. NSFW communities will be tagged, and efforts will be made to keep SFW communities clean, but proceed at your own comfort level.
This pic is an acoustic coupler, which played sounds and listened to them from the handset. Modems would connect directly to the phone circuit, bypassing actual sound waves (although they did still have a little speaker so the you could hear what they received).
This pic is an acoustic coupler, which played sounds and listened to them from the handset. Modems would connect directly to the phone circuit, bypassing actual sound waves (although they did still have a little speaker so the you could hear what they received).