This was one of the stations near Boston that connected Boston with Albany (thus, this was known for decades as the Boston and Albany Railroad). Telegraph lines pararelled this east-west route ever since the early 1850s and these pole lines were rebuilt several times during its approximate 130 years of existance. In this photo I believe the lines you see were constructed in the 1880s and Western Union likely owned one or both routes. This was typical 1880s construction and consisted primarily of CD 145s. However 127's were sometimes reused from older poles.