Define where "up there" is.
PS ---Melb. is below Syd.
What transfer software do you have ?
using PIP or DNC ?----I'd say you will be using PIP
COM1 plug= ? pins ( 9 or 25 )
RS232 plug at the MC ? ( normally 25 )
PC 25pin --> OSP 25pin is wired differently than PC 9pin
How is your cable wired now ?
Always start by sending a file from the MC to PC
MC has different settings for Reading and for Punching
This is god info
but shows only a 25 --> 9 pin layout
for a 25 --> 25 pin the differences are
----PC-pin2 --> OSP-pni3
----PC-pin3 --> OSP-pni2
----PC-pin7 --> OSP-pni7
----no pins need bridging on the PC end
Do you have contact with Okuma Aust. ? Greg W. (apps guy) would be a good start