Economic DevelopmentgalleryBirmingham's BT TowerBirmingham's BT TowerBookmarkShareEconomic DevelopmentByDanielle Hicks13:05, 26 JUN 2015Updated13:06, 26 JUN 2015Birmingham Central Exchange in Newhall Street in 19221 of 9Birmingham's BT tower formerly known as the Post Office Tower and, before that the GPO Tower.2 of 9Birmingham Trunk Toll Exchange in 19673 of 9Telephone House Newhall Street 19094 of 9A Birmingham lineman in the early days of telegraphy, the interior of the top hat was used as a receptacle for tools5 of 9The Midland Exchange6 of 9Telephone operating school in Birmingham circa early 20th century7 of 9Birmingham HPO Telegraph School8 of 9Telephone House in Birmingham in 19549 of 9