MICS Trunk Lines cards drop

[ForestGump]

MICS (6.0) has 3 analog CL cards, (two in KSU and 1 in trunk mod.).
We continually drop cards 2 and 3 Lines 5 through 8.
No events recorded, Cards and KSU are new.
Solutions have been to reboot. All is well after rebooting.
Any suggestions welcomed.
Thank you

 

[Dasheen]

Test lines at the demark. If ok then probably bad cards on system. Also swap lines 1-4 w/ 5-8 and see if problem stays w/ card or stays w/ lines 5-8. if problem starts happening on card 1 lines 5-8 then telco is the problem.