[wellylug] DSE Serial Modem Flow Control

[Jamie Dobbs]

> How is a serial modem a winmodem?

A list of known external (ie. serial) Winmodems can be found at
http://www.devidal.tv/~chris/winmodems/extlist.html

In this case the Intel 566x is listed as a full hardware external modem
which according to
http://www.devidal.tv/~chris/winmodems/intel/intel_565x_566x.html should
work with the standard Linux kernel and the setserial command.

>
>
> 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
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>>
>>
>>
>>
>>
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>