For Success with Unified Voice for On-premise Connect Deployments be kind to SIP Traffic

Issue: Avoid latency caused by packet inspection of SIP traffic for Unified Voice (UV)

To avoid latency caused by packet inspection of SIP traffic UV, simply be sure to disable SIP packet inspection on an application-aware firewall. The best-practice it to implement a global address tag in the sip.xml file on the Flash Media Gateway (FMG) server.

FMG and SIP works best with Connect when there is an absence of superfluous speed-bumps; click on this diagram thumbnail to view the traffic flow among the servers:

Connect_FMG_Flow

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