AVR-Chat

Here's a link to a company selling Bell 202 (leased line) modems:
http://www.data-linc.com/llm1100.htm

Hope that helps.

Regards,
   JJ

On Friday, Apr 9, 2004, at 18:15 US/Eastern, Dave Miller wrote:

> Hello All,
>
>  
>
> I am in need of analyzing some serial data. I am looking for the 
> ability to watch the rs232 data as well as have the ASCII/Hex 
> characters show up on the display.  I am interested in such things as 
> framing errors, parity errors, etc…
>
>  
>
> Actually the ideal test equipment would let me see the data on the 
> telephone side of the modem. 
>
>  
>
> My application is kind of old school technology but it is still used a 
> lot today.  We have a device that has an acoustical modem that 
> transmits at 1200 Baud using theBell202 standard.  We are having a 
> problem with some characters getting corrupted and we are trying to 
> analyze what is happening.  My receiving modem is an external modem so 
> it is no problem to watch the data on the RS232 side.  But we believe 
> we have an issue with noise being generated by our device due to the 
> way we are driving the speaker.  So if we are watching the data on the 
> output of the modem we probably won’t see the noise only the errors 
> created by the noise.
>
>  
>
> I am not up to speed on all the meanings behind some of the telco 
> terminology so when I look at the equipment that is available now I 
> can’t find something that simply allows me to plug in my telco line 
> then pass it on to the modem.  Or lets me tap into my RS232 line and 
> displays the data.  There is a lot of fancy equipment that is designed 
> for T1, DSL, etc… but I can’t seem to figure out if it will do 
> something this simple.
>
>  
>
> Any pointers to manufacturer and model of some good equipment for this 
> application would be great.  I am interested in what’s new on the 
> market and what is no longer made but can be purchased surplus.  Most 
> of the people I talk to tell me the equipment I need has not been made 
> for 10 years or more.
>
>  
>
> Thanks,
>
> Dave Miller
>
>  
>
>
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>
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