What does 4-7 refer to

When you download a file from the net the download speed is measured in bps Bits Per Second.

4-7 is refering to 4bps to 7bps

A31Chris

00568702
This modem is a jumperless modem the 00568703 has jumpers.

It is also called a 56K Sportster .Both are ISA.

(V90/X2) First of all, x2 is an asymmetric communications technology, meaning it sends and receives data at different speeds. It downloads (receives data) at up to 56 Kbps, and uploads (sends data) at up to 33.6 Kbps.

x2 takes advantage of the fact that telephone networks are now mostly digital. It eliminates the analog-to-digital conversion in the downstream direction and thus uses the maximum amount of the available 64 Kbps bandwidth. U.S. Robotics states that, "This technique makes modems with x2 fundamentally different from other high-speed modems. In fact downloads could more accurately be described as encoded, rather than modulated."

(V90/K56) A technology developed by Lucent Technologies and Rockwell International for delivering data rates up to 56 Kbps over plain old telephone service (POTS). It was long believed that the maximum data transmission rate over copper telephone wires was 33.6 Kbps, but K56flex achieves higher rates by taking advantage of the fact that most phone switching stations are connected by high-speed digital lines. K56flex bypasses the normal digital-to-analog conversion and sends the digital data over the telephone wires directly to your modem where it is decoded.

To connect to the Internet at K56flex speeds, your Internet Service Provider (ISP) must have a modem at the other end that supports V.90.

Use the X2 phone number for your modem.