Previous desk models required a separate subscriber set or bell box that was attached by a line cord
During the 1930s they introduced the 1197 and 1198 deskphones
When the thermoplastic housings became the standard
the line cord has a modular plug on the end to facilitate the connection to your wall jack
Automatic Electric Type 1 Deskphone in brass with complimentary brass ringed handset
Western Electric 634 Anti-sidetone Subset Previous desk models required aWestern Electric 634 Anti sidetone Subset used circa 1928 37. This original metal subset would have been connected to phones such as the Model 151 Candlestick, or anti sidetone versions of the A, B, C, or D handset mountings. The subset contains the coil, condensor, and ringer that are required to make these phones function, and it would have been mounted on the wall close to the floor. The telephone line runs into the subset, and a cord runs from the