BPort DX II cable to PC

[Pat2000]

Can someone please confirm the pin-outs for a cable connecting the Bridgeport EZtrak DX II (25 way D-type) to a PC serial port 9 pin D

I have been told to wire as follows but I'm a little un-certain??

25way
1---------------1 on 9pin connector
2---------------2
3---------------3
7---------------7

4--link--5
6--link--20

I presume the links are inside the 25way D-type?
should 2 go to 2?
should 3 go to 3?

what should I do with the screen on the cable? link to 0v? both ends??

I will be using EZutils on the PC, the main use of the cable is to back-up in a quicker way the programs on the m/c.

thanks in advance,

Pat

[Pat2000]

I've just tried this config today but no joy, I don't think pin 1 is wired inside the Mill, can anyone point me in the right direction

[Al_The_Man]

Pin 1 in the 25pin is not always connected try this link
http://www.cadem.com/ncnet/dnc-detai...t-boss-8-9.pdf
Al.

[Pat2000]

Thanks a lot for that Al, will try.

Pardon the Q but whats the basic difference in 'full handshake' and 'null modem'

I just want the link for file transfer - is one for 'drip-feeding' ?

I'll study form on your link, appreciate your help

Pat

[Al_The_Man]

Null Modem cables usually have full handshake, on the 25 pin side, pins 4,5,6,8 & 20 are concerned with handshake these cross over to the appropriate counter part pin on the other end, 4 would go to 5, 5 would go to 4 etc, when jumpered out it means hardware handshake is not in effect, many systems just use software code handshake.
Al.