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check the configuraiton of TRUNK
check the configuration of prefix
check the setting of subbpx.
the maxtkccount set to 0 cause the issue ,
from the log ,we can the release reason:
[2015-01-22 17:11:20.02][LOGID=0x61][ccm.c 65895][CCMNo = 87] SubPbx = 0, MaxTkcNum = 0, Now Used = 0, reached the upper limit.
MaxTkcNum = 0,reached the upper limit.
configure the maxtkccocount to 3000 ,issue resolved .
with command :config modify subpbx maxtkcnum 3000
in default ,the maxtkccount of subpbx is NA ,no limited .
but if you create new subpbx , you need to modify all the maxtkccount for them .