Urgent: ISDN timer

[md. nazri]

hi all, While doing troubleshooting on 3810 router, I got this output when issue sh proc cpu command: BKRB027RT120#sh proc cpu CPU utilization for five seconds: 99%/23%; one minute: 99%; five minutes: 99%  PID  Runtime(ms)  Invoked  uSecs    5Sec   1Min   5Min TTY Process    1       38279   1093597     35   0.00%  0.00%  0.00%   0 Load Meter    2         168       110   1527   0.00%  0.00%  0.00%   0 PPP auth   PID  Runtime(ms)  Invoked  uSecs    5Sec   1Min   5Min TTY Process   46      152197   5016983     30   0.00%  0.00%  0.00%   0 TDSM_PERIODIC_TA   47           0         2      0   0.00%  0.00%  0.00%   0 IP VOICE INPUT   48           0         2      0   0.00%  0.00%  0.00%   0 IP VOICE OUTPUT   49           4         2   2000   0.00%  0.00%  0.00%   0 ISDN_CSM   50    74007133  19140060   3866  74.72% 75.43% 75.20%   0 ISDN Timer   51           0         1      0   0.00%  0.00%  0.00%   0 Time Range Proce   53           4         2   2000   0.00%  0.00%  0.00%   0 CC-API_VCM    I believe the cpu is dying by looking at the utilization for 5sec. I'm querious what does it mean by ISDN Timer which took most of the cpu process..cld anybody pls explain...   when checking the router config, I came across this input in global config   isdn switch-type basic-net3 call-history-mib retain-timer 500   once again I need anybody to xplain what the 2nd command's for. Is this relate to ISDN Timer process..?   thanx in advance   TQ   rgds nazri