Telecommunications Heritage Group The group to join if you have an interest in telecommunications history.
Bob's Telephone File The place to find out about subscribers apparatus.
Light Straw ATE A brilliant site full of interesting stuff.
Sam's Telephone Site A site full of interesting telecoms stuff. This is the place to get your N diagram, or to find out more about railway comms.
Telephones UK A site crammed full of photos of phones, line jacks, and all those bits and bobs that you don't know what are for!
Noisy Line Page A well put together personal website, not just about phones.
Phoneman A site full of good pictures of a wide range of equipment, from both near and far.