I have already used many ATA (Analog Telephone Adapter) devices to connect my old analog phones into my SIP soft-switch. It works great. BUT, I need to connect a digital phone (Aastra 5216) to my SIP soft-switch as well. I was told by one supplier that I could use the ATA for that but I am fairly sure that the ATAs only support analog telephones (hence the name). Are you aware of an adapter that will allow me to connect a digital phone to my SIP switch.