RS422 to RS232. Can a cable be pinned out or is a converter required?

[dauphin77]

I am performing some testing and I need to have a satellite modem with an RS422 (db37) interface adapter communicate with my PC RS232 Serial Port (db9). I believe I will need some type of converter for the modem and PC to communicate but curious if there is a way to do this without a converter such as building a cable RS422 (db37) to RS232 (db9) and if so, is there a pinout available? I am guessing this cannot be done due to the signalling characteristics being different for 422 and 232.

Can anyone confirm this? Please help!!

 

[barry]

RS-422 is differential; RS-232 is single-ended. The voltages are totally different, you need a converter.

 

[dauphin77]

RS-422 is differential; RS-232 is single-ended. The voltages are totally different, you need a converter.

Thanks barry for the conformation.