TR16

HELLO PIX AND EVERY ONE IN THIS FORUM
I AM NEW IN GSM
I AM WORKING ON TRAFFIC CHANNELS BETWEEN BSC AND MSC ON A INTERFACE.
ACORDING MY DIFINITION IN BSC SIDE THE LAST CIC IN ONE TRANSCODER IS 23 CHANNELS ACTIVE AND 7 CHANNELS IN THE END OF THIS CIC MUST BE IN THE SLEEP STATE.
IN ONE CASE A FEW OF THIS 7 CHANNELS ARE FAIL(INSTEAD OF SLEEP)
BY replace TR16 OF THIS LINK(IN TRANSCODER) BY LINK 3 THE FAIL CHANNELS ARE MOVED.
EXAMPLE:
BEFORE REPLACE TR16:
FAIL FAIL SLEEP SLEEP FAIL SLEEP FAIL FAIL

AFTER REPLACE TR16:
SLEEP FAIL FAIL SLEEP SLEEP FAIL FAIL SLEEP
MY VENDOR IS NOKIA BSC AND SWITCH ERRICSON

PLEASE QUICK REPLY!