🚀 go-pugleaf

David Longley wrote:
> 
> I  have  an odd problem with an Internal V34 fax  modem,  a  half
> length, V1428VQH dynalink I think.
> 
> The  modem  is recognized by the PC in DOS, and  responds  to  AT
> commands  with OK and passes diagnostics. The problem is that  it
> never picks up the line and always responds with NO DIALTONE.
> 
> I've swapped leads and suspect a problem in the analogue side  of
> the board, maybe a relay?


I'm guessing that the lead you swapped has the same wiring as the first
one?  (If not, then the rest of this message is probably irrelevant to
you (-(   )

Most non-UK modems I've seen use the middle pair of contacts to go to
the line and have a cable wired 1:1, 2:2, 3:3, 4:4.  The UK BT plug uses
the outer two of the four active connections for the line and often
needs a cross-over to work with non-UK modems.

I'm assuming you have a cable with an RJ plug one end and a BT plug the
other.  Try swopping the wires at one end so that the two inner wires go
to the outer contacts and vice versa.  (Or buy a suitable cable from
Tandy etc.- I think they offered me a choice but I made up my own cable
from one of their kits.)

Hope this helps,
Andy.
==
andy@ackery.demon.co.uk

N.B. When replying directly, please remove the _ before the uk