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I have a problem with calling out - I get one way audio, I can't get incoming calls, or I can't receive voicemail notifications.
You may have a problem with an internet router setting called SIP ALG, and this SIP ALG setting needs to be disabled.
SIP ALG Issues
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Address
Polycom, Inc.6001 America Center Dr
San Jose, CA 95002
Telephone
+1.408.890.6000
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