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Forum Topic - Dialing into a remote QNX site using dialup modems:

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Kevin Warkentin(deleted)

07/06/2011 4:03 PM

post87160

Dialing into a remote QNX site using dialup modems

I have been trying to connect to a QNX remote computer using dialup modems.
However I can only get a CONNECT message. I never get a QNX login prompt.
The modem command we are using in the sysinit is as follows:

 tinit -t con1 con2 con3 con4 con5 con6 con7 con8 -c "modem -b 9600" -t /dev/ser1

 I've tried lowering the baud rate to 4800,2400,1200 but I still get the same result.
A connect at a particular baud rate but no login prompt.

Anyone have suggestions as to what to try next.

The remote site is using a TRENDNET TFM-560X v.92 56K modem while the calling site is using an old Courier HST modem

Kevin Warkentin(deleted)

07/08/2011 12:21 PM

post87217

Re: Dialing into a remote QNX site using dialup modems

Anybody have any thoughts.
We were initially able to connect at 4800 but got garbage characters displayed and finally got the QNX login prompt. 
We logged out and then tried again with the same results.
We tried again and this time got no garbage characters and instantly got the QNX login prompt.
We then thought we would powere down the modem and restart to do a power down test.
After this we never got another QNX login prompt.
We were able to connect at 4800  and got the usual grabage characters displayed but never got the QNX login prompt again
.
We tried many attempts but could not get the QNX login prompt.
We are suspected a poor quality line but would welcome any other suggestions or tests to perform.

Thanks,Kevin

Robert DeFreitas

07/11/2011 6:06 PM

post87258

Re: Dialing into a remote QNX site using dialup modems

Kevin:

     Instead of starting the modem program via the sysinit file try starting it this way:

on -f # -t /dev/ser1 modem -b 9600 &

Where # is the node number.

Granted it will only accept one connection since the modem program won't restart once you disconnect but see what 
happens.

Rob

Kevin Warkentin(deleted)

07/12/2011 9:09 AM

post87272

Re: Dialing into a remote QNX site using dialup modems

Thanks Rob:

  I'll give this a try and let you know.

  - Kevin



Robert DeFreitas <community-noreply@qnx.com> 
07/11/2011 06:07 PM
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Re: Dialing into a remote QNX site using dialup modems






Kevin:

     Instead of starting the modem program via the sysinit file try 
starting it this way:

on -f # -t /dev/ser1 modem -b 9600 &

Where # is the node number.

Granted it will only accept one connection since the modem program won't 
restart once you disconnect but see what happens.

Rob




_______________________________________________

General
http://community.qnx.com/sf/go/post87258

Kevin Warkentin(deleted)

07/13/2011 9:52 AM

post87323

Re: Dialing into a remote QNX site using dialup modems

Hi Rob:

I tried your suggestion of running modem from the command line instead of the sysinit but unfortunately got the same 
results.

I get a connect and then a whole string of ?~?~?~ ECECECECECECEC?
characters and then nothing . No QNX login prompt.
This garbage occurs when connected at 4800 or higher.
Lower baud rates give me a connect and nothing else. No QNX login prompt.
The customer has stated that the line quality is poor for data transmission however fax transmission seems okay.
Their plan is to have the phone company try and improve the quality of the analog line.

- Kevin

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