U.S. Robotics Courier 3453B V.92 56k serial modem (2005)

An in-depth look and demonstration of a very late serial modem. Includes a field guide to 56k connectivity today (and why two ordinary modems will never establish a 56k connection), and the register settings to make this particular modem emulate any kind of older modem standard. Collection of V.90/V.92 handshakes with Digital Impairment Learning (DIL) sounds: https://goughlui.com/2016/05/03/project-the-definitive-collection-of-v-90v-92-modem-sounds/ Free-to-use V.34 dial-up ISP by viewer Mike Dank: https://dialup.world/ 2600 Network (56k-capable BBS gateway): https://2600.network/ List of dial-up BBSs: https://www.telnetbbsguide.com/bbs/connection/dial-up/list/brief/ My Northern Telecom Norstar 6x16 key telephone system is for sale: https://www.ebay.com/itm/166947466154 Table of Contents: 0:00:00 - Introduction 0:07:22 - Why two 56k modems won't connect at 56k 0:17:03 - Physical overview 0:27:00 - Demonstration / How to force older modulations 0:53:00 - Calling a Bell 103 modem 0