I have the official real tested answer. The documentation is AWFUL, but it does work. Here is a sample string:
Nortel-i2004-A,172.20.1.200:4100,1,1;172.20.1.200:4100,1,2;0.0.0.0:5000,0,0,PARTSECUREMENU.
Replace the 172.20.1.200 address with your call server IP, of course. Replace...