Telephone advertising is a broad category including antique porcelain telephone signs (and tin, cardboard, etc.), vintage phone directories, pins, paperweights, print advertisements, employee service awards, and other ephemera related to telephones or telephone companies.

There is also a wide variety of collectible telephone advertising attachments: convenience items that were attached to early telephones and promoted local businesses and their phone numbers (undertaker, taxicabs, meat market, garage, stationary store, etc.) These items included pencils, writing pads, advertising discs, address books, and even glass mouth pieces.