[Elecraft] Is the K2 cable to the computer the same as one for the K3?

I am using a built according to the manual K2 cable between my K3 and USB/serial port adapter/computer. It seems to have good functionality, except I can't use the Function keys in the N1MM logger to send code. I suspect it might be that jumper that was in the K2 cable. If the K2 cable is

Re: [Elecraft] Is the K2 cable to the computer the same as one for the K3?

The K2 cable only has the TS RX and GND connections used for serial communication. It does not have connections for RTS or DTR which can be used to key the K3 because the K2 does not have those signal pins. The K2 DB9 socket is not a true RS-232 connector and you can damage the K2 by plugging a