[GreenKeys] Teleprinter over Internet.

[Martin]

I wonder if anyone on this list has tried to achieve teleprinter over 
Internet?

I have a system using 80 volt to RS232 signaling conversion and then 
using ordinary 200 baud V21 data modems to exchange data.

I have very successfully sent Telex from a message generator to my No 15 
over my U13 telephone exchange at home, and also over the BT network, at 
least as far as my local exchange and back (2.5 miles each way), all 
error free over a few dozen lines of quick brown fox. So I have no 
reason to doubt the system should work further, as well as data modems 
ever did, especially since digitisation of the phone network.

However, I am disappointed with CNET. My suspicions seem to be well 
founded, in that over the Internet timing gets screwed up such that the 
error rate is very high. In printing a few dozen lines of The quick 
brown fox, the chances of getting one line without error are small, and 
many are completely garbled. My broadband connection may not help, as I 
only get 500k download and worse upload, but generally voice connections 
have sounded pretty good, but obviously they are not as good as they 
sounded!.

I have used gateway facilities,  so its a double journey and in either 
case the problem was much the same, but I suspect the problem will be 
the same even in one hop. Even leaving the circuit standing at Mark 
there is a dropout several times a minute causing an error print.

Martin

-- 
--
CNET Lashford 230
http://www.ckts.info/192/uk

This Email personally scripted by: Martin
The Strowger aficionado's site is at http://www.aeolian-hall.myzen.co.uk