Well, I found a previous forum that explain that is possible to connect ISDN phone direct to a VIC 2B-NT/TE with the following config:
!
isdn switch-type basic-net3
!
interface bri 0
no ip address
isdn switch-type basic-net3
isdn overlap-receiving
isdn twait-disable
isdn incoming-voice voice
isdn layer1-emulate network
isdn protocol-emulate network
customer gateway has a VIC2-2BRI-NT/TE module.
Does it work? Is it the same config?
Thanks a lot