What release Partner system do I have?
All Partner Releases
Partner phones will work on the entire series of Partner phone systems. But for programming, you do need to know which release you do have.
If you have a Partner ACS, from any display phone, you can press, “Feature 59″, and it will display the release and firmware revision.
If nothing happens, it is an older Partner plus or Partner II. In that case you need to do a “beep test”:
To perform the test, access any phone line and press “feature #1″ You will hear a series of beep tones. Use the following to determine which Partner Processor you have.