User's Manual

If liquid has been spilled or objects have fallen into the product.
If the product has been exposed to rain or water.
If the product doesn’t operate normally by following the operating instructions. Adjust only
those controls that are covered by the operating instructions.
If the product has been dropped or the cabinet has been damaged.
When the product exhibits a distinct change in performance, such as the inability to perform
basic functions – this indicates a need for service.
Require Safety Check
Upon completion of any service or repairs to this product, ask the service technician to perform
safety checks recommended by TurboComm to determine that the product is in safe operating
condition.
Overview
The modem provides you with high-speed data communications over the television cable network
by following the widely accepted DOCSIS/MCNS standards being developed by the multimedia
cable network system consortium. Those standards offer a combination of high performance and
interoperability among many of the cable system operators in North America.
Working of Cable modem
Digital signals are represented by high and low electrical voltage levels. And how fast these levels
can switch and still be transmitted is determined by the “Bandwidth” of the transmission system.
The pair of wires used in a telephone connection have greatly limited bandwidth, because of their
electrical characteristics. So what we do is connect a device called a modem between the computer
output an the phone line. The modem generates an electrical wave whose strength and phase change
in step with the highs and lows of the computer’s digital output. It’s because of the “smoothness” of
the resultant signal that a higher date rate can be transmitted.
A cable modem Modulates and Demodulates electrical signals in the same sense that the telephone
modem does. However, since coaxial cable can carry much higher wave frequencies, cable modems
are far more sophisticated. Their internals can include a tuner, a bridge, a router, an
encryption/decryption device, an SNMP agent and an Ethernet hub. Furthermore, none of the