I am working on a NEC DSX 40 telephone system. I want to upgrade the version of the intramail cards . A few years ago I saw some tech info that showed how to get some software that will allow you to ugrade the version of the intamail to the higher version so it will be compatible with other NEC DSX systems higher level version. My question is where can this information be found. I am hoping someone on here can help me. I have had good experiences on this site in past times with very helpful members.