[WEBINAR] Application Acceleration: Faster Performance for End Users


Definition - What does V.22bis mean?

V.22bis is an ITU Telecommunication Standardization Sector (ITU-T) standard that extends the V.22 standard by providing a faster transmission rate using quadrature amplitude modulation (QAM) at 600 baud to carry digital data at 1,200 or 2,400 bits per second, although the 1,200 bit rate is more compatible with the standard.

V.22bis is pronounced "v-dot-twenty-two-biss."

Techopedia explains V.22bis

V.22bis was developed in 1984 to allow synchronous and asynchronous 2,400 bps full duplex modems to be used on dial-up lines and two-wire leased lines.

Modems that adhere to V.22 standards are intended for use on general switched telephone network (GSTN) connections and on point-to-point, two-wire leased telephone circuits.

The important features of V.22 modems are:

  • Channel separation using frequency division
  • Inclusion of test facilities, scrambler, compromise and adaptive equalizers
  • Duplex mode of operations on point-to-point leased circuits and GSTN
  • Data signaling rates of 2,400 bps synchronous, 2,400 bps start stop, 1,200 bps synchronous and 1,200 bps start stop
  • Compatibility with a V.22 modem operating in 1,200 bps signaling rates and automatic bit rate recognition
  • Quadrature amplitude modulation for every channel with synchronous line transmission at 600 baud

Techopedia Deals

Connect with us

Techopedia on Linkedin
Techopedia on Linkedin
"Techopedia" on Twitter

Sign up for Techopedia's Free Newsletter!

Email Newsletter

Join thousands of others with our weekly newsletter

Free Whitepaper: The Path to Hybrid Cloud
Free Whitepaper: The Path to Hybrid Cloud:
The Path to Hybrid Cloud: Intelligent Bursting To Amazon Web Services & Microsoft Azure
Free E-Book: Public Cloud Guide
Free E-Book: Public Cloud Guide:
This white paper is for leaders of Operations, Engineering, or Infrastructure teams who are creating or executing an IT roadmap.
Free Tool: Virtual Health Monitor
Free Tool: Virtual Health Monitor:
Virtual Health Monitor is a free virtualization monitoring and reporting tool for VMware, Hyper-V, RHEV, and XenServer environments.
Free 30 Day Trial – Turbonomic
Free 30 Day Trial – Turbonomic:
Turbonomic delivers an autonomic platform where virtual and cloud environments self-manage in real-time to assure application performance.