🚀 go-pugleaf

 >>>                   I should have an ISDN-2 line being installed by
 >>> the end of next week and am wondering if I will have to resort to using my
 >>> analogue modem over my V.Fast telephone line just because the software is
 >>> unavailable for my compyter (RPC 600). 

 >> It is my belief that most ISDN TA's will emulate a Hayes modem, and can be
 >> plugged into your RPC, leaving the software oblivious to this fact. Whether
 >> Demon will support a digital connection at their end is another matter
 >> entirely...
 >> 
 >    
 > Sorry but isn't this wrong?

Nope.

 > The whole point about ISDN is that its a digital transmission network
 > therefore the conventional MODEM-PSTN-MODEM setup is useless because you
 > don't need to convert to analouge, you just send the straight digital data
 > stream down the line.

Nope. A modem is a device to convert the signals from a serial port into
something the transmission line can handle and back again. An ISDN TA is
a device to convert the output of a serial port etc....  

 > The TA (Terminal adapter) connects your computer to the ISDN line at a very
 > fast data rate, upto 128Kbaud per sec if using X25 and both data channels on
 > ISDN 2! It also dials the number and sets the line up (using the D channel
 > I believe).  Therefor to use ISDN you need a suitable TA card to link
 > computer to ISDN and a software, like ISDN manager on the Mac, to control
 > said TA.  Your comms s/w must also support the ISDN card.

OK, so call the TA a modem for ISDN. All of them I've seen so far are
controlled by standard Hayes command sets with no more extensions than
any other modem.

 > I may be wrong but I didn't think there was any s/w on the Acorn that could
 > do this, I hope I'm wrong!

Arcterm 7, Hearsay, ANT Internet, KA9Q/!TCPIP. You're wrong! :-)

          Anthony

PS. 0845 0798667 is Demons ISDN dialup I believe...

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