Chainunvailble problem


#1

Hi,
When i call a phone,I got a chainunvailbe status after ring a time.It seems that the caller and called phone can native bridge. Why? Is it the codec reason?
– Called aa/01082856897
– SIP/aa-59fc is ringing
– SIP/aa-59fc answered SIP/5971-fd48

The called phone is no problem.