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Cannot receive calls from PSTN

Publication Date:  2017-09-05 Views:  158 Downloads:  0

Issue Description

The Customer trying to call from outside analog line to the AT0 trunk and hear busy tone but when trying to call from mobile call recived by the IVR

Alarm Information

Busy tone 

Handling Process

1. Make default user from the AT0 trunk to make the call recived 

2.Make auto answer for the default IP Phone of the EXT we added in the default AT0 trunk and decrease the time of the auto answer to 0 > call faild to recive and hear busy tone 

Root Cause

The problem is when u1960 offhook more quickly, peer system will be failed to recognise the offhook and send busy tone 


run this command 

config modify timerinterval pid os_pid_vu timergroup 0 timerindex 5 interval 3000

now we add the offhook time to 3 seconds to solve this problem.