8 Nov
2010
8 Nov
'10
12:40 p.m.
Hello
I am looking for info on a Gandalf LDS120 modem, specifically the serial port pinout.
I know it... I have a few, and may even have a schematic somewhere.
First thing is that it's not a PSTN modem. It's an interface for a fairly
long (severla km I think) private line. You use them in pairs, link the
the Tx screw terminals of one to the Rx screw terminals of the other.
The DB25 pinout is what you'd expect. RS232, wired as a DCE.
-tony