I have a E1 link, using microwave radio link. I wish to terminate one end on a 7507 router using the PA-4E1G/75 and the other end on a 3640 using, using vwic-2mft-e1. Would there be any problem with this. My concern is that after configuring the channel group on the vwic, the bandwidth says 1984kbit?. Please, need an urgent answer.