you should use unde interface configuration modeboru(config-if)#isdn number called enbloc 24BRTamer

you can use preference command under dial-peer's..

try this config.controller E1 1/0 pri-group timeslots 1-31!!interface Serial1/0:15 no ip address encapsulation hdlc no logging event link-status isdn switch-type primary-net5 isdn overlap-receiving T302 5000 isdn protocol-emulate network isdn incomin...