My system consists of GXW4104 , GS2000 Phones, 3CX and a few 3CX phones. We have our existing amplifier and audible Horns through our our manufacturing area. Now I need to get this connected using this system. Does any one know if the Gradstream 488 would be the correct appliance to submit the Ethernet to an analog signal thus feeding the original amplifier? Granstream has not responded to the question at this time. Thanks in advance.