I have a cisco 1760 Voice Gateway router with a VIC2-4FXO card with 4 analog phone lines, and a PVDM-12 module. Will this PVDM-12 support another VIC2-4FXO card with 4 more analog phone lines, which would total 8 lines. I know the "12" means 12 channels, but I didn't know if one pots line took two channels for communication. If this was the case I could only have 6 pots lines right? Any assistance would be greatly appreciated. I'm looked at the PVDM-12 datasheet and its not answering my questions.