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We have been using ADTRAN 908e as an outbound Proxy and the expectation is to convert UDP to TCP for all SIP messages. Can someone please confirm whether Adtran supports it or not? We have been seeing 403 Forbidden for incoming INVITEs from PBX. Any confi

We have been using ADTRAN 908e as an outbound Proxy and the expectation is to convert UDP to TCP for all SIP messages. Can someone please confirm whether Adtran supports it or not?

We have been seeing 403 Forbidden for incoming INVITEs from PBX. Any configuration would be helpful.

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