I have a customer with a TDM400P and 4fxo modules on it. When they are on the phone they do conference calls all teh time, but this ties up 2 lines now instead of just the one like when they had their old pots phones.
I have been searching on how to send the flash hook to the line but havent found anything. Does anyone know how to do this? I have btoh grandstream gxp2000’s and a couple of Polycom 501s at this site.
Any pointers would be appreciated.