Cable vs. V.90 modems
Cable modems emerged in consumer markets as an alternative to ISDN and regular modems only a couple of years ago. Promises like speed up 30 Mbps to connect to the internet sounds very attractive given that the service charge is only $35-$55 a month. But the whole thing has been overhyped in my opinion, none of the cable companies mention that the subscribers share the bandwidth plus most cable modems use 10BaseT interface to connect to the PC or Mac which automatically limits the connection to 10 Mbps. Another limitation of cable modems is that ISP's are connected to the internet back-bone using T1 lines which puts an absolute limits on speed of cable connection to 1.5 Mbps The cable modem access network operates at Layer 1 (physical) and Layer 2 (media access control/logical link control) of the Open System Interconnect (OSI) Reference Model. Thus, Layer 3 (network) protocols, such as IP traffic, can be seamlessly delivered over the cable modem platform to end-users.. Since cable modem technology is very recent the conflict exists between different standards. The only specification that has been approved by ITU (in 1998) is DOCSIS (Data Over Cable Service Interface Specifications) which was developed by MCNS,
The DVB-RCCL/DAVIC specification was developed by a combination of standards bodies including DAVIC, IEEE 802.14, and the ATM Forum. The specification has been recognized as the preferred technology by the ECCA, a consortium of European MSOs. As a result, it represents the only technology that rivals DOCSIS as a standard for international deployments. The transmission speed of cable modem is much higher than V.90 modem. It could be not the fastest on the market (compared to the ISDN, ADSL, T1) but when considering the costs of any other alternatives I came to the conclusion that cable modem even with all limitations (discussed above) is a much better way to go than V.90 modem. A consumer has to be careful when deciding between cable and V.90 modems. First one has to determine if his/her ISP supports V.90 standard then they have to find out if the phone line that they are using is able to achieve speeds higher than 35Kbps and last the cost of the connection has to be analyzed. For users with only one phone line in the house been connected to the Internet means that they cannot receive any phone calls. Installation of the second phone line could be costly and one would have to pay around twenty dollars a month for the second line (considering they don't dial long distance to ISP which would run up the bill) plus the fee that ISP charges could be anywhere from fifteen to twenty five dollars month. All this comes to around forty dollars to have a phone line (voice) and connection to the Internet. The prices for cable modem range from thirty five to fifty five dollars a month and the only other costs involved are installation costs (equipment rental fee is usually included with monthly fee). At the physical layer, which defines modulation formats for digital signals, the IEEE and MCNS specifications are similar. T
Some common words found in the essay are:
VS V90, Rockwell Lucient, ATM IEEE, NIC IEEE, Broadcom Terayon, Modems Cable, PC Mac, MCOs CableLabs, Model Layer, Provider ISP, cable modem, cable modems, phone line, ieee 80214, able achieve, dollars month, transmission speed, transmission speed 35kbps, 6 mhz, media access, speed cable, ieee 80214 committee, five dollars month,
Approximate Word count = 1234
Approximate Pages = 5 (250 words per page double spaced)
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