1media/User Manual_Page_4_Image_0001_thumb.jpg2025-03-26T23:09:41-04:00Amin Asgari Araghie74e2f1bb20ef03809181bc884697cc6ec371f1dNTD-image-Displayphone User Guide3An image of the 1981 Displayphone User Guide, featuring a clean, structured layout with Northern Telecom’s branding. Page 4, featuring detailed wireframe line drawings of the device, showcasing its form and key components in a see-through technical illustration.media/User Manual_Page_4_Image_0001.jpgplain2025-03-26T23:24:40-04:001982Amin Asgari Araghie74e2f1bb20ef03809181bc884697cc6ec371f1d