• Comparison of Standards
• The V.92 Protocol
• Multiple PPP
• Why does my IP Address change every time I dial in?
• Some Telco Terminology
• Can multiple computers use the same dial-up connection?

V.32
Speed: 9.6 kbps
Year Introduced: 1984

V.32bis
Speed: 14.4 kbps
Year Introduced: 1991

V.34
Speed: 28.8 kbps
Year Introduced: 1995

V.90
Speed: 56 kbps (33.6 kbps upstream)
Year Introduced: 1997-1998

V.92
Speed: 56 kbps (48 kbps upload)
Year Introduced: 2000-2001

about.com

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by Cariad edited by TravisB
last modified: 2006-07-24 23:54:23

"V.92 is an ITU-T recommendation, titled Enhancements to Recommendation V.90, that establishes a modem standard allowing near 56 kbit/s download and 48 kbit/s upload rates. V.92 was first presented in August 1999. It is intended to succeed the V.90 standards. With V.92 PCM is used for both the upstream and downstream connections; previously 56K modems only used PCM for downstream data." (Wikipedia)

Sources & Additional Information:
Wikipedia

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by CJPC edited by TravisB
last modified: 2006-07-25 00:06:47

Also known as "shotgun". This means you connect two modems, to two phone lines, and dial-in to your ISP for double the bandwidth of 56k. Most recently some phone companies have capped phone line data transfer at 26400, meaning that if you get two phone lines the second might be slower. It costs quite a bit of money too. The key thing with "shot-gun" is that your ISP MUST support the use of two dial-up modems at once. You must contact your ISP before doing this to avoid extra charges that might result in logging in twice.

One alternative is satellite. Satellite has decent prices and will provide you with good download speeds. The only problem is that the pings are higher than normal 56k which causes problems for gamers. ISDN is another alternative, although it's usually expensive.

discussion in dial-up forum

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by TravisB
last modified: 2006-07-24 23:54:40

Your IP address is a dynamic IP address that is given to you each time you dial up. When you disconnect, that IP address is freed. The odds of getting the same IP address two times in a row are very slim for national providers, but slightly more for local providers. Dynamic IP addressing saves IP address space so that the ISP can serve the same amount of customers with less IP addresses.

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by NickD edited by TravisB
last modified: 2006-07-24 23:54:46

Bps - Bits Per Second.

Central Office - The Telco facility where your local telephone circuit leads to. Contains Switches and Trunks as well as the local telephone circuits.

DTE - Data Terminal Equipment--When using serial communications such RS-232, V.35, or X.21, the DTE is the device sending/receiving from a modem or CSU/DSU. In contrast to DCE.

Kbps - KiloBits Per Second. Measure of digital channel capacity.

Pairgain - The term "pairgain" is used for any piece of equipment that will allows multiple voice channels to leave the CO as T1. It then terminates on a piece of equipment out in the field that will take that T1 signal and use the 24, 64 kbps DS0 channels for voice applications.

POTS - Plain Old Telephone Service. Regular old-fashioned analog loop start phone service.

Repeaters, Boosters or Amplifiers - Used to "boost" (amplify) the signal when your distance from the central office exceeds 20 miles (33 kilometers).

RJ-11 - Short for Registered Jack-11, a four- or six-wire connector used primarily to connect telephone equipment in the United States.

Splitter - "Splits" the jack plug two or more ways to allow more than one device to be connected in any one jack.

Telco - Telephone Company. Your local telephone service provider.

Trouble ticket - A telco "work order" used to track Customer Repairs within the Telco. If you call someone "inside" the telco's repair department they will need this number to proceed. It will also be needed whenever you call to check on the status of a repair.

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by redxii edited by TravisB
last modified: 2006-07-24 23:54:52

"There are five steps that you'll need to take in order to share your dial-up connection:

1. Connect your computers into a Local Area Network (LAN).

2. Configure the computers on your LAN to use the TCP/IP protocol that they'll need to connect to the Internet.

3. Select and install the software or hardware that allows the single Internet connection to be shared.

4. Configure the other computers in your LAN so that they access the Internet via the shared connection.

5. Secure all the computers in your LAN against intruders." (Practically Networked)

Sources & Additional Information:
Practically Networked

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by DracoFelis edited by TravisB
last modified: 2006-07-25 00:08:44