The Grade I listed Bell-Edison Telephone Building at 17-19 Newhall St, Birmingham was completed in 1896 to the design of architect Frederick Martin of the firm Martin & Chamberlain. Whilst fairly plain at ground level, the upper storeys feature a rich variety of terracotta ornamentation. It was constructed to house the new Central Telephone Exchange and offices for the National Telephone Company (NTC). Birmingham's central exchange had 5,000 subscribers and was the largest of its type in the country.