With the HDX RealTime
Optimization Pack for Microsoft Lync, the HDX RealTime Media Engine runs on the
user device. The HDX RealTime Media Engine performs Signaling and Media
transmission. To help you understand which ports are used by the HDX RealTime
Media Engine for supporting external users, equate running the HDX RealTime
Media Engine with running the Microsoft Lync client locally on the user device.
The difference is XenApp and XenDesktop host the UI and business logic layers.
Understanding that the media engine is running on the remote endpoint clarifies
the port requirements.
External users outside
of the corporate firewall connect to the Lync Edge Server, a component of Lync
Server infrastructure that must be installed on a dual-homed server in the DMZ
with connections to both the Internet and to the intranet. The port
requirements are listed at:
To find the Lync Edge
Server, the HDX RealTime Media Engine follows the same procedures as the Lync
client. See "How Lync Clients Locate Services" at
Internal users inside
the corporate firewall connect directly to the Lync Server that runs inside the
firewall. They also communicate point-to-point between other Lync clients
during calls. If your company has internal firewalls, you must make sure that
the proper ports are open to connect with the Lync Server and to transmit and
receive media during calls. The port requirements are listed at: