[asterisk-users] [IAX] Recommended soft- and hardphones?

[Alex Balashov]

My experience does not support your conclusions.  In my personal 
observations of situations in which I have been involved, most 
allegations of serious SIP problems related to source NAT ("IP 
masquerading") are exaggerations stemming from lack of subject matter 
comprehension.  This is bearing in mind, duly, that SIP and NAT *is*, 
inherently, a problematic equation - of that, there can be no question.

But I've never had problems getting a SIP soft phone to make and 
receive calls from anywhere I've taken it.  The only substantial 
problem I've run into is that many NAT gateways lose UDP state quite 
quickly, so after a certain period of inactivity, calls cannot be 
received;  this is solved by decreasing the re-registration interval, 
or increasing the frequency of state-sustaining SIP OPTIONS pings, 
etc.  Many service providers have implemented such steps since the 
last time I was involved with this problem seriously.

I'll take your word for the fact that IAX may be easier, though.

Michelle Dupuis wrote:

> I assume you're kidding?!
> 
> RTP is mangled/blocked by most hotspots and mid-size company firewalls...
> 
> IAX is often the only way our staff can connect while on the road.
> 
> -----Original Message-----
> From: asterisk-users-bounces at lists.digium.com
> [mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of Alex Balashov
> Sent: Friday, October 30, 2009 8:03 AM
> To: Asterisk Users List
> Subject: Re: [asterisk-users] [IAX] Recommended soft- and hardphones?
> 
> Vincent wrote:
> 
>> Since SIP/RTP is a pain to use with road warriors who need to connect 
>> from any location over the Internet, I'd like to get them some IAX 
>> phones instead.
> 
> What gives you that idea?
> 
> --
> Alex Balashov - Principal
> Evariste Systems
> Web     : http://www.evaristesys.com/
> Tel     : (+1) (678) 954-0670
> Direct  : (+1) (678) 954-0671
> 
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-- 
Alex Balashov - Principal
Evariste Systems
Web     : http://www.evaristesys.com/
Tel     : (+1) (678) 954-0670
Direct  : (+1) (678) 954-0671