Sign up here to get top career advice delivered straight to your inbox every week. The request: openLogicalChannel and response: openLogicalChannelAck messages are being used once the call is answered to negotiate the control and media ports that are being used for the call.Subscribe To The Forbes Careers Newsletter The above is the initial capability exchange.
In a H.323 call H.245 is used as a control channel protocol in order to establish the call. The RTP ports used for this application as an example use Ports 16386 for the Caller and 3230 for the Called. The above as an example is a call between a GroupSeries and a Real Presence Desktop Clients. NOTE: Please always check the Admin Guide or Release Notes for specific ports per device used! The RTP ports used for this application as an example use Ports 3230 for the Caller and 3232 for the Called. The above as an example is a call between two Real Presence Desktop Clients. It then uses H.225 via TCP to setup the call and alert the far end.įurther into the above trace the Endpoints then exchange their capabilities In the above example the End Point is setting up a call to another endpoint located at 10.252.149.103 and is establishing the H.323 TCP connection on port 1720 to setup the call. It then uses H.225 via TCP to setup the call and alert the far end without the far end answering the call. In the above example the End Point tries to setup a call to another endpoint located at 10.252.149.103 but cannot establish the H.323 TCP connection on port 1720 to setup the call. Far End Port 1720 blocked for Call Setup.
Outbound ports to a Polycom Video productĪ few simple examples in regards firewall blocked ports. NOTE: Always check the Release notes or Admin Guides for ports being utilized!įor basic SIP troubleshooting please check => here General Settings > The above is just a basic guideline and additional ports are described below and ports may vary if Desktop or Mobile clients are being used.
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