V.21 MODEM

Modems Glossary

Modems — V.21 Modem

 

 

 

 

 

 

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Information on V.21 Modem

V.21 is an ITU fax modem standard. Characteristics of a V.21 modem include:

  • Bit rate: 300 bps
  • Modulation: FSK
  • Carrier frequency: 980, 1180 Hz (originate) 1650, 1850 Hz (answer)

     V.21 is used to carry the digital identification signal that identifies the capabilities of the receiving fax to the calling machine.


Other topics in our resources on Modems related to V.21 Modem include: 
 
  • Group 3 fax modem
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