Are you using dialer profiles or legacy ddr? We can use either to bind physical interfaces to a dialer interface.
1) Interface BRI4/0 & 4/1 are associated with interface dialer 10 using dialer rotary groups.
interface BRI4/0
dialer rotary-group 10
!
interface BRI4/1
dialer rotary-group 10
!
interface Dialer10
2) Interface BRI4/2 & 4/3 are associated with dialer 20 using dialer profiles (Note, here we can also specify which physical interface can have a preference in the pool to receive calls first).
interface BRI4/2
dialer pool-member 20
interface BRI4/3
dialer pool-member 20
!
interface Dialer20
dialer pool 20
c3745(config-if)#dialer pool-member 20 ?
max-link Maximum number of B channels for pool
min-link Minimum number of B channels for pool
priority Priority of interface in pool <===
For more info please refer:
http://www.cisco.com/en/US/tech/tk801/tk133/technologies_tech_note09186a0080094e6c.shtml
Thanks, Mak