[wellylug] DSE Serial Modem Flow Control

Pete Black pete at marchingcubes.com
Wed Feb 9 07:40:47 NZDT 2005


How is a serial modem a winmodem?


On 8/02/2005, at 8:05 PM, Jamie Dobbs wrote:

>  That looks like a 'soft' modem (ie. WinModem) style of modem to me.  
> Best to get rid of it and see if you can find anyone that has a "real"  
> modem.
>
>  Jethro Carr wrote:
> On Tue, 2005-02-08 at 22:06, Jamie Dobbs wrote:
>
> Make sure you have a fully compliant modem cable and use hardware flow
> control - soft flow-control is generally crap.
>
> I know I have a decent modem cable. I use the one from the box & I also
> tried the one from my other modem.
>
>
> I've sent an email to DSE support. Maybe they can give me some info.
>
> Also, here's what I've found from playing around:
>
> I can download anything okay, & upload very small amounts of data (such
> as a request to view a webpage),but when I want to upload something of
> common size - such as sending an email, the program will timeout.
>
> I've looked this up in google & the Linux Modem & Serial Port HOWTOs,
> and they say this sort of program can be caused by flow control not
> working.
>
> I looked up the AT command set for this modem in the PDF manual, and it
> says that the K3 & K4 commands should enable flow control. I tried  
> these
> AT commands, but they appear to make no effect on the problem. I also
> tried to change the serial port settings with the stty program, but  
> this
> didn't work either.
>
> The modem lights are like:
>
> DISCONNECTED FROM THE WEB:
> MR = on
> CTS = on
>
> CONNECTED TO THE WEB:
> MR = on
> TR = on
> CD = on
> SD & RD = on when data transfer is occuring.
> RTS = on
> CTS = on
> OH = off
>
>
>
> if anyone can help me, it would be great.
>
> Does anyone else here have this particular modem? If so, I wouldn't  
> mind
> seeing what AT commands you use with it.
>
>
> thanks,
>
>
>
>
> hi all,
>
> I just got a DSE Electronics Serial 56k Modem
> (  
> http://www.dse.co.nz/cgi-bin/dse.storefront/ 
> 4207ba1c0067f898273fc0a87f9906e9/Product/View/XH1142 )
>
>
> It works, except I can't seem to enable flow control. This is a  
> problem,
> because when I try to upload anything, the modem gets the data sent to
> it too fast, and drops the packets. This makes it impossible to even
> send email.
>
>
> Can anyone give me some help here?
>
> I've tried using the &K4 command (to enable xon/xoff), but it doesn't
> appear to do work. :-(
>
>
>
> thanks,
>
> --
> -- Jethro
>
>  dodocaptain at paradise.net.nz
>  jethro.carr at jedolinux.com
>
>  http://www.jedolinux.com
>  http://homepages.paradise.net.nz/jethroc
>  http://homepages.paradise.net.nz/jethroc/cv.html
>
>  http://www.wellylug.org.nz
>
>
> --
> Wellington Linux Users Group Mailing List:  
> wellylug at lists.wellylug.org.nz
> To Leave:  http://lists.wellylug.org.nz/mailman/listinfo/wellylug
>
>
>
>
>
>  No virus found in this outgoing message.
> Checked by AVG Anti-Virus.
> Version: 7.0.300 / Virus Database: 265.8.5 - Release Date: 3/02/2005
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: text/enriched
Size: 3277 bytes
Desc: not available
Url : http://lists.wellylug.org.nz/pipermail/wellylug/attachments/20050209/98545902/attachment.bin 


More information about the wellylug mailing list