X2

What is X2?

Definition and meaning of X2

X2 was a Modem Protocol evolved by means of U.S. Robotics (now 3Com) to Download Records at fifty six Kbps underneath pulse-Code Modulation without the want for modulation/demodulation. It used V.34 to add statistics at 33.6 Kbps using plain old Cellphone provider lines.

X2 cHanged into changed through the V.Ninety trendy, which combines each X2 by way of U.S. Robotics and K56flex from Rockwell Semiconductor.

What Does X2 Mean?

The X2 Modem protocol overcame the long-held perception that 33.6 Kbps became the fastest facts transmission price possible over copper wires. Knowing that most phone Switching stations were related with the aid of excessive-speed virtual traces, X2 removed the want to modulate/demodulate Digital facts using an Analog provider sign. As a result, the ordinary modulate/demodulate Method become removed, taking into consideration a quicker statistics Transfer Rate. If the Internet Carrier issuer (ISP) had a virtual connection to its cellphone office, the X2 modem now handiest needed to decode the multibit Voltage pulses, simply because the Smartphone traces have been designed to do at the beginning.

However, X2 had some prerequisites in conjunction with the better Downstream transfer price:

• The Upstream records Switch remained at 33.6 Kbps with a most viable price of 40 Kbps
• The ISP had to offer a modem that supported V.90 at the originating cease of the switch
• Noisy traces resulting from interference from other phone strains should reduce the maximum viable transmission fee

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