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I have a pbx avaya cs1000 rl6.0 with ip335 polycom, ip avaya 1140 and digital phones m3904 avaya.

When I call ip avaya 1140 to ip 335 polycom no problem.

When I call ip 335 polycom to digital phone avaya m3904 no problem.

When I call digital phone avaya m3904 to ip 335 polycom,  digital avaya m3904 ok, but polycom ip335 can not hear audio for m3904.

 

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