I am in need of a replacement for having a regular POTS line from AT&T. I currently have AT&T POTS line that I use to access some of my Siemens systems. The cost is just keeps going up. Does anyone know if it is possible to use a VOIP line (Vonage) or any other type of VOIP line for dialing into Siemens switches (CCA) I have heard several different opinions on the success of this. Do you have any suggestions on to lower the cost to remote access to Siemens switches and Phonemail. I have a PC that I run ProComm and would like to find a cost effective way to connect a phone line, Landline or VOIP and be able to successfully connect to Siemens switches and Phonemail. Please be specific with details. Thanks in advance.