Скачать с ютуб Dial Up Modem Sounds, 56K Edition в хорошем качестве

Dial Up Modem Sounds, 56K Edition

This is a follow-up to the earlier modem sounds video here:    • Dial Up Modem Sounds, from 300 bps to...   The sound of 56K for various modem models and standards. Prior to V.90 there were competing x2 and K56 Flex standards, which are included here. Even when V.90 was official though, different models of modems tended to sound different from one another when connecting. This is the result of part of the V.90 spec called the Digital Impairment Learning sequence (DIL). The analog (client) modem asks the digital (ISP) modem to send a set of symbols (sounds). When the analog modem receives those symbols, it can compare the sound it asked for and the sound it received to determine how it was degraded by how the digital signal was handled along the path from the ISP, and then adjust the connection speed to compensate. The digital signal might be affected by things like Robbed Bit Signalling and digital pads. The interesting thing is that the V.90 spec doesn't actually specify what the DIL sounds should be, just that the digital modem should send whatever the analog modem asks for. The result is that it can sound quite different for different client modems. This video is just a sample of a few different modem models connecting using V.90. Server Specs: AMD K6-2 @ 350MHz 512MB SDRAM 16GB SD Card w/ SD/IDE Adapter 10Mbps 3COM 3C509 ISA Ethernet Adapter US Robotics Courier I-Modem (x2 and V.90 support) Patton Dialfire 2977/B4/U (K56 Flex and V.90 support) Dialogic Diva 4BRI-8M PCI v2 (V.90 support) Windows Server 2003R2 Laptop #1 Specs: Toshiba Tecra 500CDT Intel Pentium @ 120MHz 144MB EDO RAM 1.2GB IDE HDD 12.1" 800x600 Active Matrix TFT LCD Windows 98SE Laptop #2 Specs: Compaq Armada M300 Intel Pentium II @ 333MHz 128MB SDRAM 6GB IDE HDD 11.3" 800x600 Active Matrix TFT LCD Windows 2000 Professional Laptop #3 Specs: Lenovo Thinkpad X1 Carbon G9 Intel Core i7-1185G7 32GB LPDDR4-4266 1TB Western Digital SN850 SSD 14" 1920x1200 IPS LCD Windows 2000 Professional (in a VirtualBox VM) Teltone ILS-2000 ISDN Simulator Dialogic DIVA T/A ISDN terminal (used for Analog/Digital connection) 0:00 Intro 0:04 x2 0:30 K56 Flex 1:05 US Robotics V.90 1:36 Zoom V.90 2:11 Hayes V.90 2:40 Intel V.90 3:11 Creative Labs V.90 3:45 Xircom V.90 4:25 Lucent Softmodem V.90 4:59 Agere USB Softmodem V.90 5:37 Frank the Snake