Item is a photograph of telephony voice and data transmission over telephone wires technology with discreet control buttons for absolute control over a data connection.
Item is a photograph of telephony voice and data transmission over telephone wires technology. This handset, produced by the ROLM corporation is connected to a central CBX (computer branch exchange) for establishing data connections.
Item is a photograph of telephony voice and data transmission over telephone wires technology. This handset, produced by the ROLM corporation is connected to a central CBX (computer branch exchange) for establishing data connections.