!
controller E1 1
 framing NO-CRC4
 clock source internal
 pri-group timeslots 1-5,16
 loop-detect
!

interface Serial1:15
 no ip address
 no logging event link-status
 isdn switch-type primary-qsig
 isdn overlap-receiving T302 4000
 isdn network-failure-cause 127
 isdn incoming-voice voice
 isdn T321 0
 no cdp enable
!