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How are H.460 ports negotiated?

I want to register a LifeSize Express 220 on a VCS Expressway using H.460

The UDP media ports for a LifeSize endpoint registered to a Transit server are different then for a TANDBERG/Cisco endpoint

registered to a VCS Expressway.

Now the big question is: which media ports will be used when this LifeSize endpoint registers on a VCS Expressway using H.460?

Are the ports defined by the server (VCS Expressway) or the client (endpoint) in the H.460 standard?

Or are they somehow negotiated?

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How are H.460 ports negotiated?

Hi Rachid,

per my understanding the H.460 is used for H.323 endpoints only. Plus the ports details you can find below

For connections to the VCS Expressway using the Assent protocol, the default ports are:

Call signaling

• UDP/1719: listening port for RAS messages

• TCP/2776: listening port for H.225 and

H.245 protocols Media

• UDP/2776: RTP media port

• UDP/2777: RTCP media control port


For connections to the VCS Expressway using the H.460.18/19 protocols, the default ports are:

Call signaling

• UDP/1719: listening port for RAS messages

• TCP/1720: listening port for H.225 protocol

• TCP/2777: listening port for H.245 protocol

Media

• UDP/2776: RTP media port

• UDP/2777: RTCP media control port

• UDP/50000-52399: demultiplex media port range

The media ports used is mostly dependent on the endpoint sending the media. if the endpoint is capable of sending Multiplexed media it is always prefered.

if the endpoint is not capable of multiplexed media it will use different ports. range varies with different endpoints.

Thanks

Alok

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