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(If you see a connection speed of 38400, 57600, or 115200, don't be fooled -- that is the serial port speed between your computer and your modem, not the speed between your modem and the remote modem. To report the modem-to-modem speed, your modem probably needs a different initialization string. Consult your documentation.)

Note: Reported initial connect speeds won't necessarily be dependable or even comparable from modem to modem or location to location. The reason is that V.34 modems can (and often do) speed shift up and down after the initial connection, and do so in a manner that is dependent on the particular connection as well as the particular equipment (including firmware versions) at each end. (See "What are "fall-back" and "fall-forward"?") Some modems connect at a more conservative speed and then quickly upshift as conditions allow; other modems connect at a more aggressive speed only to quickly downshift (or worse, lose performance due to excessive errors). Another problem is that software may report the receive speed for certain modems and the transmit speed for other modems, which can be substantially different. (See "What are split/asymmetric speeds?") Unfortunately, it is not possible to monitor the actual modem speed during the connection for most modems. Regardless, the only thing that really counts is net throughput, which can be measured by many communications applications.

  • If you rarely get 26.6 kbps or 28.8 connects, the reason is almost always a result of phone line quality. 28.8/33.6 modems are pushing the limits of today's telephone system. Getting 28,800 bps connections requires pristine telephone line conditions end-to-end. Here are three paragraphs, which are from a paper entitled "Of Line noise, The Phone Company, and Your Modem" by Patrick Moore, Supra Corp., (They make modems)
  • If you consistently connect at 26400 or above, there may not be much that you can do to go faster -- it's simply not possible to achieve the highest V.34 speeds on many phone circuits. (This is not false modem advertising -- 28800 modems are designed to wring as much speed out of the actual real-world connection as possible, and 28800 or higher speed is only possible on a near-perfect connection.)
  1. Repeatable results with V.FC/V.34 modems on real-world phone lines are sometimes difficult to obtain. Unlike V32.bis modems, V.FC/V.34 modems will actually modify their data coding (symbol rate) and transmit levels during the connect phase. Very minor differences in the phone line can lead to quite different results.
  2. A 28.8K connection on some real-world lines may not occur very often, if it occurs at all. Preliminary testing in the lab indicates that "normal" phone line attenuation makes a 28.8K connection difficult even in the absence of line noise. This is not surprising considering that the V.FC & V.34 coding schemes are relying on the bandwidth of the phone system being greater than what is actually available in some areas. Very high-speed connections assume that there is a substantial amount of digital technology in the system (thereby normally increasing the usable bandwidth). Some users are going to find that their local phone system effectively limits them to 16.8K or 19.2K.
  3. Both the originating and the answering modem are adjusting to their line conditions during the connect phase. The fact that a connection to a given modem at a given location occurs at a lower rate (19.2k for example) may have nothing to do with the modem the call is placed with, or the location it is placed from, as the modem on the other end may be adjusting the baud rate down.
  • For the above reasons, many people will never see 28.8 or even 26.6 CONNECTS with their 28.8 modem. The easiest way to find out if its your phone line or your modem is to find someone who usually gets 26.6 or 28.8 connects, and try your modem on her system, or his modem on your system. You will most likely find that the problem at your end is phone-line related. If you consistently connect at lower speeds (e.g., 24000 or even 21600), there may still not be much that you can do.
  • The part of the telephone system which you may be most able to improve is your telephone premises wiring. If you rarely get 28.8 or 26.6 connects, try the following:
  1. Watch out for heat. Some modems work better cold than hot, and vice versa. Generally speaking it is a good idea to make sure that the modem does not get too hot.
  2. With a PC Card (PCMCIA) modem in a laptop computer, try disconnecting the computer from AC power and running on battery alone.
  3. If you have your modem connected to the phone line through a surge suppresser, try it without the surge suppresser. Many surge suppressers can interfere with modem communications.
  4. Make sure that your serial port is locked at 38400 or higher (57600 recommended). This is usually set within your comm application, not the Windows Control Panel
  5. If that doesn't help, listen carefully to the quality of your voice connections. Note that you must dial a known quiet number, since many otherwise good phone lines exhibit excessive noise until you actually connect. (Dialing a single digit is not enough.) After you connect, if you hear more than very faint hiss and/or hum, then you probably have a line problem.
    While a quiet line is important, there are other line problems that can reduce your speed: bandwidth (frequency response), distortion, etc. It is difficult to test for these problems without proper test equipment, but it's still a good idea to listen carefully for audible problems, particularly if you can find a number that will send you test tones.  
  6. Premises Wiring . . . Often faulty premises wiring, bad phone jacks and plugs, cheap phones, old/antique phones, or too many phones or other devices cause problems. Here is how to determine if your premises wiring or equipment is affecting your CONNECT quality. Find the telco wiring block where all your premises wiring connects -- it will usually be outside or inside of your house near where the phone line comes in. Run a good quality twisted pair phone cable directly between the block and the phone jack that serves your modem, routing so as to avoid other electrical wiring and devices -- and then disconnect all other premises wiring from the telco block. Note that only two conductors are necessary in modern residential systems (normally green and red). If this gives you faster connects, then your premises wiring or your phone equipment is causing you trouble. Reconnect wiring and phone devices incrementally while retrying the modem to see if you can find the culprit. Examine each plug and jack, and reseat each several times. Where visible, inspect the routing of the phone wiring to assure it steers clear of other wiring and electrical devices. If you find some of your equipment or premises wiring is contributing to the problem, the recommended solution is to replace or eliminate the equipment and/or wiring.
  7. Telephone Co. Line Quality . . . If you determine that your premises wiring is not causing problems, and you still get low connect speeds, you can try a few other things like calling a known quiet number and listening carefully -- if you hear hissing, humming, a radio station or other background voices, you have a line problem (you may have a line problem even if the line sounds quiet). Reporting noisy conditions will probably be sufficient to get the phone company to look into the "problem". You may be able to get them to test and improve your line, but be aware that all they guarantee to provide is a line meeting voice quality standards, and also they may want to charge you for the testing if they find no line problem. So you telling them your modem can't get 28.8 connections probably won't motivate them. However, it has been reported that the phone company will generally be responsive to fax problems, so report those if you have them. Your connect speeds will frequently be lower when you are distant from your telephone exchange , and when your call must pass through more than one exchange.
  8. You may be told that you need a special "data" line, more properly called a "conditioned" circuit, which is considerably more expensive than a standard "voice-grade" circuit. Don't waste your money. All you need is a good quality "voice-grade" circuit. 

HIGH SPEED (28.8 KB/Sec) V.34 MODEMS ON THE TELEPHONE NETWORK

  • The technology of dial modems has reached the point where they are pushing the theoretical limits of how much data can be passed over an analog telephone connection. The latest type of high speed modem is built per a standard called V.34. Under the best of conditions these modems can pass data at 28.8 kb/sec. The data speed that can be supported on an analog circuit is a function of the bandwidth of the channel and the noise on that channel. Wide bandwidth, low noise connections, can carry more data than narrow bandwidth, high noise connections.
  • The telephone network was designed to provide a connection with enough bandwidth so that voices could be heard clearly and that the speakers voice could be recognized. That's why the bandwidth of a voice channel is from 300 Hz to over 3000 Hz. Noise is inherent in a telephone system and can have many sources. The telephone company will try to control noise so that it is not objectionable to most people. Any attempt to increase bandwidth or reduce noise, costs money. So the bottom line is that the telephone company will try to provide a good quality voice connection at a reasonable cost.
  • The telephone network is designed to provide good voice service on most connections at a reasonable cost. Any connection can be made up of combinations of local facilities, multiple switch connections, and multiple interoffice facilities. Because of these variables, not all connections will be the same. Some connections will be better than others.
  • Modem manufacturers have taken advantage of the fact that some connections will have higher bandwidth and less noise than other connections. When connections are ideal, the new modems can run at 28.8 kb/sec. If there is less bandwidth or more noise, the modem may end up running at a lower speed. These modems are designed to adjust their speed to deal with less than ideal conditions. As conditions permit they will run at 26.4kb/sec or 24.0kb/sec or 19.2kb/sec or less. The additional variable is the modem itself. Some modems will deal with line conditions better than others.
  • The telephone company cannot guarantee any minimum speed on any connection on the telephone network. Some modems deal better with the normal limitations of the telephone network than others. The telephone company must, however, ensure that it is providing good quality voice service. Some impairments may not be detectable with a simple voice test.

 

Modem speeds have always been a big deal with Internet Connections. We find that many people can get between 24000 and 28800 connect speeds. There are FEW (in the few hundreds) that can get true 33.6 speeds. If you are experiencing random connection speeds to us, most likely it is a problem with the telephone lines, your modem, or premise wiring. There may not be much you can do.

You can try to set the connection rate for your connec to cyberbay.net in Dial-up Networking to 57600 or 38400 (Click the configure button while you are in the properties for cyberbay.net in Dial-up Networking.)

The above paragraphs should explain plenty in regards to connection speeds. Your connection to us may very well differ from your connection to another ISP, just like calling to China is different from calling to England. You may experience different performance levels.

Connection rates also can fluctuate from day to day! Weather conditions can affect line performance. Your telephone company may be doing work on some line or switch between your place and our place that could affect your line conditions favorably or unfavorably.

The basic information that we are trying to convey is that on our end, everything is set up to receive calls on the specified lines at the posted kbps. If you dial into a 33.6 line, then you are attempting to connect to our 33.6 port. Whether you get a 33.6 connection is entirely determined by the factors discussed in the above articles.

k56logo.gif (3419 bytes)x2smlogo.gif (2698 bytes)v90.gif (1282 bytes)
 

The V.90 implementation for 56K is currently the standard for 56K technology. Your ability to connect with a 56KFlex Rockwell/Lucent product will depend totally on the equipment installed. We are curretly supporting both K56Flex and V.90. If you are still using K56Flex, you may be able to upgrade to the V.90 standard. Please contact your modem manufacturer. Regardless if you are using K56Flex, or the new V.90 standard, the below information still applies.

  1. Bill Herd of InterActive Network Systems had this to say about the 56K battle..
  2. 56k connections are only "one way". Since 56k technology depends on only one analog/digital conversion in the path between you and your ISP rather than the 2 conversions normally encountered. This means that your 56k connection will actually be some variant of a 56k/33.6k split speed connection. In one direction data will move at a higher speed than the other direction which will be limited to speeds available via current modem technology. Typically, this will be 33.6k or less, although Lucent technologies has announced the ability to utilize 45k rather than 33.6k connection rates.
  3. The FCC is preventing true 56k connections and are limiting connections to 52k. Companies wanting to provide 56k technologies are petitioning the FCC to reverse this restriction.
  4. There is no guarantee that you will acheive a 56k connection. If you currently connect at speeds less than 33.6k with your current 33.6k modem, you will likely not realize the full potential of a 56k/33.6 connection. (Note by Cyberbay.net team -- You should achieve a connection speed of around twice what you currently connect at)
  5. Many providers will have to initially charge more for 56k connections due to the initial high costs involved. The equipment and line costs involved to provide this technology will cause many providers to setup separate dial-in pools for 56k connections.

The use of "X2" when refering to "56k" technology is incorrect in that it refers to only one manufacturers (USRobotics) proprietary version of the the emerging 56k technology.

Currently the Lucent/Rockwell 56k will not work with the USR X2. The two "camps" have not agreed to support each others products.

Reference:

*** Note by Cyberbay.net Team ***

Cyberbay.net provides K56Flex access and V.90. Our suggestions to our users is to pass on 56k technology for the proven ISDN technology unless your computer already comes with a 56k modem. ISDN users receive 64k to 128k both ways on a digital signal versus the asynchronous analog/digital signals for 56K. ISDN lines are clean and very stable whereas the lines used for 56K will still be using your standard unstable analog lines.

As was said in the above quote, If you can not get 33.6 kbps out of your current lines, them most likely you will not be able to fully realize a 56K connection. Also your 56k modem will have to be no farther than a couple of miles from the telephone switching station. (Currently only about 5% of US telephone lines can support 33.6) The investment involved with purchasing new ISDN equipment is more expensive but you will experience a true digital connection with ISDN. If you do not want the added expense of an ISDN connection then 56K is the way to go!

 


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