<div class="thumb tright"><div class="thumbinner" style="width:222px;"><a href="//commons.wikimedia.org/wiki/File:FIESA_7_Alexander_Graham_Bell_248.jpg" class="image"><img src="https://upload.wikimedia.org/wikipedia/commons/thumb/3/37/FIESA_7_Alexander_Graham_Bell_248.jpg/220px-FIESA_7_Alexander_Graham_Bell_248.jpg" decoding="async" width="220" height="165" class="thumbimage" srcset="https://upload.wikimedia.org/wikipedia/commons/thumb/3/37/FIESA_7_Alexander_Graham_Bell_248.jpg/330px-FIESA_7_Alexander_Graham_Bell_248.jpg 1.5x, https://upload.wikimedia.org/wikipedia/commons/thumb/3/37/FIESA_7_Alexander_Graham_Bell_248.jpg/440px-FIESA_7_Alexander_Graham_Bell_248.jpg 2x" data-file-width="1600" data-file-height="1200"></a>  <div class="thumbcaption"><div class="magnify"><a href="//commons.wikimedia.org/wiki/File:FIESA_7_Alexander_Graham_Bell_248.jpg" class="internal" title="Enlarge"></a></div>A sculptor's impression of the other end of the conversation</div></div></div>
<p>Telephony plaque, 710 Main Street, Cambridge, Massachusetts, USA. According to this plaque 710 Main Street was one end of the first two-way long distance telephone conversation, which extended across three hours on October 9, 1876. Thomas G. Watson was at this location, and spoke to <a href="//commons.wikimedia.org/wiki/Alexander_Graham_Bell" title="Alexander Graham Bell">Alexander Graham Bell</a> at 69 Kilby Street, Boston, Massachusetts.
</p>
This building had previously been the Davenport Car Manufactory, pioneering manufacturer of railroad cars, as noted in another plaque on the facade.
<a href="//commons.wikimedia.org/wiki/User:Daderot" title="User:Daderot">Daderot</a>
2008-05
<span class="int-own-work" lang="en">Own work</span>