TA410 loud noise on incoming call

Good evening, 

since today faced problem 

after dialing a number of my ta410 it is connected and after i hear long noise till i press any button, after i am moved to my ivr from my call center. 

the day before this issue started same moment after connection to TA410 i was transferred to my call center ivr. 

i am not sure what is the real cause of this problem, 




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