Question : Slips on ISDN PRI

I'm getting slips on my ISDN PRI circuit and I'm not sure why. It doesn't seem to be affecting voice quality but they're making me nervous.

T1 0/1/0 is up.
  Applique type is Channelized T1
  Cablelength is short 110
  No alarms detected.
  alarm-trigger is not set
  Soaking time: 3, Clearance time: 10
  AIS State:Clear  LOS State:Clear  LOF State:Clear
  Version info Firmware: 20090408, FPGA: 13, spm_count = 0
  Framing is ESF, Line Code is B8ZS, Clock Source is Line.
  CRC Threshold is 320. Reported from firmware  is 320.
  Data in current interval (758 seconds elapsed):
     0 Line Code Violations, 0 Path Code Violations
     33 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins
     33 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 0 Unavail Secs
  Total Data (last 16 15 minute intervals):
     0 Line Code Violations, 0 Path Code Violations,
     620 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins,
     620 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 0 Unavail Secs

Config:

Building configuration...


Current configuration : 3202 bytes
!
! Last configuration change at 13:53:05 EST Sat Nov 21 2009
! NVRAM config last updated at 13:53:06 EST Sat Nov 21 2009
!
version 12.4
service timestamps debug datetime msec
service timestamps log datetime localtime
service password-encryption
!
hostname RTR2811-1
!
boot-start-marker
boot system flash:c2800nm-ipvoicek9-mz.124-24.T2.bin
boot system flash
boot-end-marker
!
card type t1 0 0
card type t1 0 1
logging message-counter syslog
enable secret 5 $1$hfBa$BRzCeuU1Ft2oUfjefReLq1
!
no aaa new-model
clock timezone EST -5
clock summer-time EST recurring
network-clock-participate wic 0
network-clock-participate wic 1
!
dot11 syslog
ip source-route
!
!
ip cef
!
!
no ipv6 cef
multilink bundle-name authenticated
!
!
!
!
isdn switch-type primary-ni
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
voice-card 0
 dspfarm
 dsp services dspfarm
!
!
!
!
!
archive
 log config
  hidekeys
!
!
controller T1 0/0/0
 cablelength long 0db
 pri-group timeslots 1,24 service mgcp
!
controller T1 0/1/0
 cablelength short 110
 pri-group timeslots 1-24 service mgcp
!
!
!
!
!
interface FastEthernet0/0
 ip address 10.130.1.26 255.255.255.0
 duplex auto
 speed auto
!
interface FastEthernet0/1
 no ip address
 shutdown
 duplex auto
 speed auto
!
interface Serial0/0/0:23
 no ip address
 encapsulation hdlc
 isdn switch-type primary-ni
 isdn protocol-emulate network
 isdn incoming-voice voice
 isdn bind-l3 ccm-manager
 no cdp enable
!
interface Serial0/1/0:23
 no ip address
 encapsulation hdlc
 isdn switch-type primary-ni
 isdn incoming-voice voice
 isdn bind-l3 ccm-manager
 no cdp enable
!
ip forward-protocol nd
ip route 0.0.0.0 0.0.0.0 10.130.1.5
!
no ip http server
no ip http secure-server
!
!
!
!
!
control-plane
!
!
!
voice-port 0/1/0:23
 echo-cancel coverage 64
!
voice-port 0/0/0:23
 echo-cancel coverage 64
!
voice-port 0/2/0
!
voice-port 0/2/1
!
voice-port 0/2/2
!
voice-port 0/2/3
!
voice-port 0/3/0
!
voice-port 0/3/1
!
voice-port 0/3/2
!
voice-port 0/3/3
!
ccm-manager redundant-host 10.130.1.24
ccm-manager mgcp
no ccm-manager fax protocol cisco
ccm-manager music-on-hold
ccm-manager config server 10.130.1.24
ccm-manager config
!
mgcp
mgcp call-agent 10.130.1.28 2427 service-type mgcp version 0.1
mgcp rtp unreachable timeout 1000 action notify
mgcp modem passthrough voip mode nse
mgcp package-capability rtp-package
mgcp package-capability sst-package
mgcp package-capability pre-package
no mgcp package-capability res-package
no mgcp timer receive-rtcp
mgcp sdp simple
mgcp fax t38 inhibit
!
mgcp profile default
!
sccp local FastEthernet0/0
sccp ccm 10.130.1.28 identifier 1 version 7.0
sccp
!
sccp ccm group 1
 associate ccm 1 priority 1
 associate profile 1 register HW-CFB_BOS1
!
dspfarm profile 1 conference
 codec g711ulaw
 codec g711alaw
 codec g729ar8
 codec g729abr8
 codec g729r8
 codec g729br8
 maximum sessions 2
 associate application SCCP
!
!
!
alias exec srt show ip route
alias exec sr sh run
alias exec s show ip int br
!
line con 0
 logging synchronous
line aux 0
line vty 0 4
 exec-timeout 0 0
 logging synchronous
 login local
!
scheduler allocate 20000 1000
ntp master 5
ntp server 10.1.0.11
end

I'm not sure what to look at to troubleshoot.

Answer : Slips on ISDN PRI

Config issue....needed to select source for network clocking

network-clock-participate 1 T1 0/1/0