[Asterisk-Users] X100P ring/off-hook in strange state 6

[tareq]

i have installed asterisk with two X100P cards, everything is working properly 
but when the channel is answered the following warning appears:

WARNING[229391]: chan_zap.c:3073 zt_handle_event: Ring/Off-hook in strange 
state 6 on channel 1

and this warning is causing some cut off in the sound.

i have looked at all previous posts but there is nothing that solved my 
problem.

is there anyone that can help, please
thanx