Data over Cable Surface Interface Specification

Data over Cable Surface Interface Specification may be the standard, but it has its disadvantages, as cdlp does. Docsis time-shared bandwidth can clog connections, especially when several users are on the same network, which can slow the data transmission through docsis cable modems. Some critics say that docsis lacks security and quality of service (QoS) as well as nonsymmetrical. Upgrades in docsis 2.0 may allow symmetrical data streams of up to 30 Mbps. The nonsymmetrical and slower data streams can hinder VoIP, but docsis upgrades will allow voice-over to fly through docsis cable modems.

Wireless Docsis
You’ve gone wireless, but is your wireless cable modem a docsis cable modem? There are wireless cable modems designed specifically to be Data Over Cable Surface Interface Specification compatible. Motorola’s wireless cdlp cable modems have been superseded by wireless certified docsis cable modems/gateways. Cisco-Linksys offers the Wireless-G Cable Gateway WCG200E that is docsis certified. Other wireless docsis cable modems include Thomson’s TCM390. For a full list consult http://www.cablelabs.com.

Docsis 2.0 Modems
Want to find out more about what is docsis? If you’re looking for a Docsis 2.0 modem, fear not: Twenty-two cable modems are now Data over Cable Surface Interface Specification certified. Motorola, the inventor of cdlp, has achieved Docsis 2.0 certification for its cable modems/gateways. To find out if your cable modem manufacturer sells a Docsis cable modem certified for version 2.0, visit the CableLabs Web site at http://www.cablemodem.com. Modems from Terayon, Texas Instruments and Thomson recently achieved Docsis 2.0 status.

If your Docsis modem is still version 1.1 or 1.0 and your manufacturer hasn’t achieved 2.0 status, you don’t need to worry, since no matter the version Docsis is the industry standard.

Docsis
What is Docsis? Docsis stands for Data Over Cable Surface Interface Specification, and is the project of CableLabs. It defines interface requirements for cable modems involved in high-speed data distribution over cable television system networks. Docsis is the “Good Housekeeping” seal for cable modems. A Docsis cable modem has been certified by CableLabs and is thought to be acceptable for commercial sale and for use in cable Internet connections. Previously, the cable modem standard was cdlp (cable data link protocol), a proprietary standard made by Motorola. Cable Internet providers and cable modem manufacturers are replacing or have replaced the old cdlp modems with Docsis cable modems. Although many systems will support both cdlp modems and Docsis cable modems, many networks have converted to Docsis and have abandoned the cdlp networks. Docsis is thought to be a less expensive technology standard for consumers.

Docsis 2.0
Docsis 2.0 is the latest standard of Data over Cable Surface Interface Specification. Unlike Motorola’s cdlp, Docsis 2.0, in addition to the features of Docsis 1.0 and 1.1, offers more secure software for Docsis cable modems, which means added security for your Internet connection. Docsis 2.0 also offers the following:
• Significantly enhanced upstream capacity
• 6.4 MHz maximum upstream channel width
• 30.72 Mbps maximum upstream channel capacity
• Increased robustness to upstream noise and channel impairments
This simply means if your Docsis cable modem is Docsis version 2.0, it offers a faster, more reliable connection than previous versions, which in turn are faster and more reliable than cdlp cable modems.

Not Docsis Certified
If you’re a customer of Australian’s Bigpond cable Internet service, Bigpond has most likely replaced your cdlp cable modem with a Docsis cable modem. Bigpond has switched from its cdlp network standard to a Data over Cable Surface Interface Specification network standard.

If you have Motorola’s CyberSURFR cdlp cable modem, Motorola also manufactures a hybrid cdlp/docsis cable router, for those of you who don’t want to surrender your cdlp cable modem. Although Net posters have proclaimed, “CDLP is dead, move on,” some cable modem buyers prefer the cdlp system. That said, most cable Internet providers and cable modem manufacturers favor Docsis.

EDocsis
EDocsis and Docsis Set-top Gateway (DSG) are two new Data Over Surface Interface Specification projects being developed by CableLabs. The DSG integrates docsis technology into a digital set-top cable box, makes it Web-enabled, and increases the two-way capabilities of the average docsis cable modem currently on the market. Its technology is to current docsis cable modems what docsis cable modems are to cdlp cable modems. You can get Scientific-Atlanta’s Explorer 8300 (TM) system, the first digital cable box system to be DSG certified.

EDocsis stands for embedded docsis, which feeds directly into a cable network’s docsis channel, Web-enables cable boxes, and solves end device/traffic management, configuration and security issues to reduce customer cost and improve speed and quality. EDocsis is the basis for DSG, and thus for Scientific-Atlanta’s Explorer 8300 (TM) system. If you want a more integrated cable TV/Internet experience that can give a larger multimedia experience, eDocsis and DSG may be for you.

CD-ROM

The maximum a floppy disk can contain is 1.44 MB. To play a game with around 200 MB you are stuck with 100 over diskettes. The CD-ROM is a revolutionary invention that allows up to 625 MB at one time. However, it is read only, which means you can’t store in anything.

Buttons Fun
Although most CD-ROMs comes with only 2 buttons, do you know you can also skip, play previous track and play the next track as well with a proper combination? Check properly on your instruction manual for additional functions. You just might be surprised what it can do.

Clean Thoroughly
It is important to clean the CR-ROM at least once every month. Get a CD lens cleaner. If possible, choose one with an alcohol solution drop. This should ensure that your CD-ROM will always be able to read properly.

Clean You CDs
It is just as important to clean your CDs often. Why? Because if you have a speck of dust on the surface of one of your CDs, once spinning at high-speed in the drive, the speck of dust is enough to produce scratches on your precious CD.

Running In DOS
One of the common problems with CD-ROMs is unable to access it under DOS. This might be because the protected-mode CD-ROM driver isn’t available. You’ll need to add the real-mode device driver, usually included with your CD-ROM drive, in CONFIG.SYS and load MSCDEX.EXE, which is available in the Windows\Command folder. You should also make sure both files are on your startup disk.

Run List
Like those cool expensive hi-fi systems, you can customize the run list of your Audio CD, only not with the CD-ROM itself. Use Windows’ CD player to customize the run list and you can have your CD running in any track order you like.

Read Ahead
The read ahead buffer is useful to speed up things. Go to Control Panel, System. Click on the Performance tab. Click on the File System… button. On the File System Properties, click on CD-ROM. Make sure you have the fullest cache. Even if you have a CD-ROM with less than Quad speed, just move ahead. You’ll be surprised to find your CD-ROM running faster.

AR RAM Disk

AR RAM Disk is a driver for Windows NT/2000/XP used to create an additional drive in your memory. This drive can be used for storing temporary files, this can increase your system speed.

http://www.arsoft-online.de/download/ramdisk.zip

Read more…

Using the RAM Disk Setup the Windows TEMP Directory to the RAM Disk:

1. Create a Batch File with the following content:
set TEMP=T:
set TMP=T:

2.Put this Batch File into the Startup Folder of Windows.

Warning:

Use AR Soft RAM Disk at your own risk.
Using large amount of memory for the RAM Disk can cause problems with other drivers or programs.
Notes:
If you reboot your system all contents of the RAM Disk will be lost!
The theoretical maximum capacity of the RAM Disk is 2GB.
If driver fails to allocate the memory, the driver does not start. The driver writes an event record into the Event Log. Please look into the Event Viewer for more details of the error.
Package contains:
RAM Disk Driver for Windows NT or Windows 2000/XP
RAM Disk Control Panel Applet