[75481] in North American Network Operators' Group
Re: How to Blocking VoIP ( H.323) ?
daemon@ATHENA.MIT.EDU (Robert Mathews)
Sat Nov 13 14:13:20 2004
Date: Sat, 13 Nov 2004 09:12:53 -1000 (HST)
From: Robert Mathews <mathews@hawaii.edu>
In-reply-to: <035401c4c8df$82365ec0$6401a8c0@alexh>
To: NANOG <nanog@merit.edu>
Reply-To: Robert Mathews <mathews@HAWAII.EDU>
Errors-To: owner-nanog-outgoing@merit.edu
On Fri, 12 Nov 2004, Alexei Roudnev wrote:
> Date: Fri, 12 Nov 2004 09:46:15 -0800
> From: Alexei Roudnev <alex@relcom.net>
> To: Robert Mathews <mathews@hawaii.edu>, NANOG <nanog@merit.edu>
> Subject: Re: How to Blocking VoIP ( H.323) ?
>
> > Alexei:
> >
> > How exactly then would anyone implement this, without screwing-up the
> > overall performance elements in the network? :)
>
> Not too easy, but I can imagine few alghoritms doing it. Remember that VoIP
> uses short packets, and you cam always recognize Ack and Tcp packets which
> should not be disrupted. Jitter does not slow down network, except if it
> interacts with RTT calculartion in TCP/IP.
Alexei:
Apologize for the delay in getting a reply to you.
Regarding your comment on jitter, FLATLY or more generally, if introducing
jitter is likely to complicate operational matters elsewhere in the
network [whether this complication manifests within one's own network or
in another - to which one is inter-connected] I would be inclined to say
this effects the overall performance...
I did not mean to take more of your time on this. But, I wanted to merely
clarify.
Best,
Robert.
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