In telecommunications V.90 is an ITU-T modem-based communications standard that provides a user-to-ISP 33.6 kbps (upstream) transmission channel and a user-supplied ISP to 56 kbps (downstream), so asymmetric. Describe the wikitesto modification
V.90 modems are connected to a digital signal on one side and provide only one-to-analog conversion. It was developed between March 1998 and February 1999. It is also known as V.Last because it stated that no further communication standards for modems on POTS lines would have been developed. In fact, at the end of 1999, the V.92 standard was developed to replace the V.90.
This standard was developed to reconcile two competing standards: the X2 and the K56flex, the first introduced by the US. Robotics and the second carried by Lucent and Rockwell International. The presence of two competing standards was both a problem for the end user and the service provider because both were required to adopt compatible devices. Links externalize the wikitesto
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