I have put just one DN to this telephones, in four keys, all of them has the same, but, when I try to enroute this telephone to another, with CAL FORWARD, and the DN which I want to transfer the call, after I call the DN it rings there and the call is not transfered to the other extension, I don´t know what could be the problem, I tried with the future CLS CFTA, but it says that the telephone has to be into a HUNT group, please, i need help.