We connected a customer IP office directly on public IP address and we ensured that all default passwords are changed and the sip port is changed from 5060 for security reasons .The customer has power user release 11 licenses and AVAYA IX work spaces works fine . We also have some 9600 series phones connected on the WAN via this public IP address but the issue now it that when a softphone calls the 9600 series there is audio but when the 9600 series phones calls the softphones there is no audio . Can you advise what might be causing this ?.
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