Hi:
I need to add an E1-PRI interfase for a Cisco 28xx to support backup data calls through an ISDN cloud.
I´m confused about what module to choose (VWIC-1MFT-E1 (G.704 framed) or VWIC-1MFT-G703 (unframed)).
1) What is the practical difference between both?
2) For VoIP, I normally choose the VWIC-1MFT-E1 module plus PVDMs, when should I use the G.703 module?