(1888PressRelease)
April 08, 2009 - By employing pulse code modulation (PCM) in the upstream direction a data rate of up to 48kbps is achieved¬ - an improvement over V.90's upstream speed of 33.6kbps. This increase is made possible by setting the V.92 clock in the demodulation process and using it in the upstream modulation.
This proves most useful in applications that involve large data transfers from user to ISP: VoIP, for example. The V.92 server modem is a digital modem with a maximum bit rate of 56kbps transmission and 48kbps reception. The V.92 client modem is an analog modem with a maximum bit rate of 56kbps receptions 48kbps transmission.
GAO V.92's downstream rate remains unchanged from V.90 at 56kbps; however there are several improvements over the V.90 implementation. Quicker modem connection time is achieved through faster handshaking. The shortened start-up time is accomplished by buffering information on past connections, and, when a match is found; handshaking can immediately begin at a previously negotiated rate.
Connection time for V.92 is up to 50% quicker than V.90 for buffered connections. When online, users will have the ability to put the 'Modem on Hold' and can receive phone calls without having to disconnect from their Internet session.
There will, however, be a time limit of between 0 to 16 minutes, which is set entirely at the discretion of the ISP.
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