I am replacing a current phone system and network infrastructure and am working on a game plan. The problem I have is the routers I'm replacing use WIC-1Ts and an external CSU/DSU the is making it a fractional T1 with 4 ports for voice between the sites phone systems. I'm installing 2901 routers and the T1 will now terminate on a VWIC2-1MFT-T1/E1 and the external CSU/DSU and voice channels will go away when we call live with the new CUCM. But in the mean time I'd like to have these new routers connected and working.
What I really need to know is, is there any way to use a VWIC2-1MFT-T1/E1 with an external CSU/DSU as a traditional serial interface?