Re: Number of ports required for video call

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Hi,

to be on the safe side, I would add a few ports to the range. After a
calls is finished, it can sometimes take up to a few minutes for all
sockets to become available again (depending on your OS and how much
tuning you did).
As a rule of thumb I would add 20%.

Regards,
Jan

Simon Horne wrote:
> 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 ...


-- 
Jan Willamowius, jan@xxxxxxxxxxxxxx, http://www.gnugk.org/

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