Re: Number of ports required for video call

["Simon Horne" <s.horne@xxxxxxxxxxxxxx>]

Andrew

 

A standard Video call requires

4 RTP ports  1 RTP audio 1 RTP video 1 RTCP audio 1 RTCP video

1 Q931 port (Call Signalling)

and optionally 1 H245 port if not H245 Tunneling

No T120 ports

 

So for 10 calls with H245 tunneling allow

40 RTP ports

10 Q931 ports

 

Simon

-----Original Message-----
From: openh323gk-users-bounces@xxxxxxxxxxxxxxxxxxxxx [mailto:openh323gk-users-bounces@xxxxxxxxxxxxxxxxxxxxx]On Behalf Of Andrew Struiksma
Sent: Saturday, May 10, 2008 1:07 AM
To: GNU Gatekeeper Users
Subject: Number of ports required for video call

I'm testing GnuGK behind a firewall and am wondering how many ports are really required for H.323 video calls. The sample nat.ini lists these port ranges:

 

Q931PortRange=30000-30999
H245PortRange=31000-31999
T120PortRange=50000-59999
RTPPortRange=50000-59999

 

However the GnuGK Manual lists these port ranges:

 

Q931PortRange=20000-20999
H245PortRange=30000-30999
T120PortRange=40000-40999
RTPPortRange=50000-59999

I would rather not leave thousands of ports open if it is unnecessary. I will be dealing with schools which will be using fewer than 10 (probably less than 5) video endpoints. Could someone please give me an idea of how many ports in each range are actually required per video call?

 

Thank you!

 

 

Andrew Struiksma
K20 Network Support Specialist - NW Regional Video ITU

 

 

Andrew Struiksma
K20 Network Support Specialist - NW Regional Video ITU
Northwest Educational Service District
1601 R Avenue
Anacortes, WA 98221
(360) 299-4063 (Office)

(360) 333-0776 (Cell)
astruiksma@xxxxxxxxx

 

www.nwesd.org
Together We Can ...

 

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