Just remember that TCP will try to retransmit your lost voice packets, what is not exactly of any use :-).

VPNs with IPSec and others (CIPE and some UDP 'related' vpns) would not create this extra (and useless) overhead. I've used IAX over OpenVPN (with SSL as you), and it does work, to some level, but I would not do it for a living :-)

Iassen Hristov wrote:
I disagree. Isn't running it over a VPN the same thing?

I have been running with no problems:
a) a soft phone over a OpenVPN VPN (over TCP)
b) a soft phone over a MS PPTP VPN
c) a hard phone over a IPSec net-to-net VPN

For the soft phone I've used X-Ten (SIP) and idefisk (IAX)
For the hard phone I've used Budgetone BT-102, Sipura SPA-841 and ATCOM
AT-320 (w/ IAX2 firmware).

I've had no problems. I suppose it is a matter of a good connection.


Message: 25
Date: Fri, 22 Jul 2005 13:48:09 +0200 (CEST)
From: Jerry Glomph Black <[EMAIL PROTECTED]>
Subject: Re: [Asterisk-Users] IAX over HTTP
To: Asterisk Users Mailing List - Non-Commercial Discussion
        <asterisk-users@lists.digium.com>
Message-ID: <[EMAIL PROTECTED]>
Content-Type: text/plain; charset="iso-8859-1"

Doing IAX over TCP is simply a Bad Idea.

Under perfect circumstances, it will work OK, but the slightest network disturbance will result in sound gaps/distortion and/or monster audio
delay.

This is not idle UDP-boosting, I've tried it.

[Have had good results with UDP-based secure tunnel transport of IAX
traffic  (CIPE and OpenVPN)]

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