V.90 MODEM

Modems Glossary

Modems — V.90 Modem

 

 

 

 

 

 

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Information on V.90 Modem

Traditional modem standards assume that there is an analogue connection to the PSTN at both ends and that upstream and downstream data requirements are symmetrical.

  • Analogue transmissions are limited to 35 Kbps in a 4-kHz channel (Shannon’s theory), and limited further by noise and distortion on the line.
  • Most applications (particularly for Internet access) require asymmetric access with much larger downstream requirements than upstream.

     V.90 modems were approved in February 1998 to achieve significantly higher data rates (up to 56 Kbps) because upstream data is sent by analogue transmission while downstream data is transmitted in digital format.
     V.90 modems are also known as V.PCM modems and replace the temporary K56flex modems.
     The analogue upstream conforms to V.34 and the digital downstream is PCM.

Manufacturers of V.90 Modem

Brands of V.90 Modem include:
  • ActionTec.  Products from ActionTec include and V.90 Modem
  • Banksia.  Products from Banksia include and V.90 Modem
  • Best Data.  Products from Best Data include and V.90 Modem
  • Boca Research.  Products from Boca Research include and V.90 Modem
  • Compaq.  Products from Compaq include and V.90 Modem
  • Diamond Multimedia.  Products from Diamond Multimedia include
  • Digicom Systems.  Products from Digicom Systems include and V.90 Modem
  • E-Tech.  Products from E-Tech include and V.90 Modem
  • Global Village.  Products from Global Village include and V.90 Modem
  • IBM.  Products from IBM include V.90 Modem
  • Intel.  Products from Intel include and V.90 Modem
  • Megahertz.  Products from Megahertz include and V.90 Modem
  • Multi-Tech.  Products from Multi-Tech include and V.90 Modem
  • Netcomm.  Products from Netcomm include and V.90 Modem
  • Ositech.  Products from Ositech include and V.90 Modem
  • Philips.  Products from Philips include and V.90 Modem
  • Smart Modular Technologies.  Products from Smart Modular Technologies include and V.90 Modem
  • TDK.  Products from TDK include and V.90 Modem
  • To-Tech.  Products from To-Tech include and V.90 Modem
  • US Robotics.  Products from US Robotics include V.90 Modem and
  • Viking.  Products from Viking include
  • Xircom.  Products from Xircom include and V.90 Modem
  • Zoom.  Products from Zoom include V.92 Modem, V.90 Modem and USB Modem

Other topics in our resources on Modems related to V.90 Modem include: 
 
  • 56k Modem
    		•
  • V.92 Modem

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