[asterisk-users] SIP v IAX2

[Guillermo Salas M.]

On Thu, 2006-10-26 at 13:14 -0400, Henry.L.Coleman wrote:
> As I understand it the main advantege IAX has over SIP is the number of
> port it uses and therefore its ability to traverse router/switches and
> firewalls
> Also the higher number of simulatanious SIP calls travelling through these
> devices adds a higher overhead than IAX with it's single port.
> Personally I like IAX but I there simply isnt enough hardware out there to
> use it exclusively.
> 

What about the bandwidth used for both protocols? Is IAX using less or
more bandwidth than SIP?



> Henry L.Coleman CEO
> *VoIP-PBX* 1-866-415-5355
> Toronto Ontario
> Canada
> 
> 
> >> -----Original Message-----
> >> From: Dave Cotton [mailto:dcotton at linuxautrement.com]
> >> Sent: Thursday, October 26, 2006 10:21 AM
> >> To: Asterisk Users Mailing List - Non-Commercial Discussion
> >> Subject: Re: [asterisk-users] SIP v IAX2
> >>
> >>
> >> On Thu, 2006-10-26 at 17:43 +0200, Pavel Jezek wrote:
> >> > with SIP qualify, I can specify, what time in delay I will accept,
> >> > with sip and setting qualify=3000 I can circumvent this
> >> anoying messages
> >> > (bacause delay in reply is about 2000ms, and I accept 3000ms)
> >> > with iax, qualify is working different, so setting
> >> qualify=3000 will
> >> > "ping" peer every 3s,
> >> > quite inconsistent, imho
> >>
> >> So are you saying that in your world two different things, created by
> >> totally different people, must have the same configuration settings.
> >
> > - You will find DUNDi configuration a lot easier with IAX, although you
> > can use SIP.
> > - If you use SIP to route calls between Asterisk boxes, you will lose your
> > caller id as SIP uses the From: number to authenitcate with. You will have
> > to store the original caller id in an extra SIP header, and then pluck it
> > out an the other end, if you want to preserve caller id. Yuck. IAX doesn't
> > have this problem.
> >
> > Doug.
> >
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-- 
Guillermo Salas M.
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