Solved

56k modem's top speeds.

Posted on 1998-02-19
6
220 Views
Last Modified: 2013-12-27
I heard that a 56k modem can only receive at that speed but transmit at 33.6k. Is it true? Does this apply to X2 technology modems or K56 flex technology modems?
0
Comment
Question by:MadHack
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
6 Comments
 
LVL 25

Accepted Solution

by:
dew_associates earned 50 total points
ID: 1145526
Hi MadHack!

There's alot of controvery on this issue depending on who you talk to. The modem speeds both ways reported by the MS winsock aren't entirely accurate either. We use Net Medic to monitor traffic and with a good ISP and solid phone line you can get to about 51 to 55k in both directions.

Here's a couple of sites that are normally pretty good with reporting these issues:

http://www.winmag.com

http://sysdoc.pair.com/

http://www.cobb.com/w95/

I you need more all you need to do is ask!
Dennis
0
 

Author Comment

by:MadHack
ID: 1145527
Well, thanks.
0
 
LVL 32

Expert Comment

by:jhance
ID: 1145528
dew,

I'm sorry but it just isn't so.  The 56K technology (both USR and Rockwell's) are asymmetric.  The downlink speed has the _potential_ for 56K but the uplink is 28.8K.  Tt is also against current FCC rules to operate the downlink at > 53K! If you are measuring speeds in excess of this you are measuring wrong or are measuring bit-rate including v.42 compression and not the signalling rate.  

The 3COM/USR web site has an excellent paper on this topic at:

http://x2.usr.com/technology/whitepapers.html
0
Percona Live Europe 2017 | Sep 25 - 27, 2017

The Percona Live Open Source Database Conference Europe 2017 is the premier event for the diverse and active European open source database community, as well as businesses that develop and use open source database software.

 
LVL 2

Expert Comment

by:lmar
ID: 1145529
I'm going to toss my $0.02 in as well.  56K modems will also only connect to digital equipment at this speed.  There can only be one analog to digital conversion (your phone line to your local switch)thus 56k to 56k is really 28.8 or 33.6.  Also, it's true they are 56k download only, and the FCC limits this to 53k (if I were a betting man, I'd bet you couldn't tell the difference).  One more thing, there are competing technologies out there so make sure your ISP supports the brand of modem you pick up.
0
 
LVL 25

Expert Comment

by:dew_associates
ID: 1145530
JHance, I stand corrected!  We have a T-1 here, so the only testing we have done is when we connect new systems to the lines that sprint has run to our facilities here, which I believe are digital/fibreoptic, but I'm not certain of that (haven't had any reason to check it until you mentioned it). Thanks for the info though, now my curiosity has been piqued.
Dennis
0
 

Author Comment

by:MadHack
ID: 1145531
Yeah. I read about that. A 56k can downlink at the maximum rate of 56kbps but only uplink at 33.6. When the other party sends the data to us at 56k, they use a T1 line connected to the telecom network cloud. That's how it's possible for them to uplink stuffs to us at 56k. :)
0

Featured Post

Create the perfect environment for any meeting

You might have a modern environment with all sorts of high-tech equipment, but what makes it worthwhile is how you seamlessly bring together the presentation with audio, video and lighting. The ATEN Control System provides integrated control and system automation.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Hello All, I have been training on Multicast for a while now and whenever I start the topic , I find out that my friends /  Colleagues mention that they do not know how to test Multicast Joins. As most of the multicast would be video traffic and …
Arrow Electronics was searching for a KVM  (Keyboard/Video/Mouse) switch that could display on one single monitor the current status of all units being tested on the rack.
NetCrunch network monitor is a highly extensive platform for network monitoring and alert generation. In this video you'll see a live demo of NetCrunch with most notable features explained in a walk-through manner. You'll also get to know the philos…
Monitoring a network: why having a policy is the best policy? Michael Kulchisky, MCSE, MCSA, MCP, VTSP, VSP, CCSP outlines the enormous benefits of having a policy-based approach when monitoring medium and large networks. Software utilized in this v…
Suggested Courses

623 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question