[Asterisk-Users] Phones that work well through NAT

C F shmaltz at gmail.com
Sat Apr 15 19:37:03 MST 2006


On 4/15/06, Andrew Kohlsmith <akohlsmith-asterisk at benshaw.com> wrote:
> On Saturday 15 April 2006 21:12, jennyw wrote:
> > We've been reasonably happy with Polycom SoundPoint phones, but we only
> > have them installed on the LAN. I've read that they have problems
> > working across NAT. So ... I guess I have a few questions. First, is
> > there a way to get Polycoms to work well over NAT? If not, then are
> > there phones of comparable voice quality that do work well over NAT?
> > Without costing a lot more?
>
> Polycoms (the IP501s at any rate) work EXCEPTIONALLY well through NAT.  It's
> as literally dead-simple as plug-and-go.  No configuration on the phone, and
> all you want is a nat=yes in their sip.conf entry.  That's it.  Seriously.

That is until you run into problems, while they do work, I wouldn't
say that Polycoms work EXEPTIONALLY well, Cisco, and SPA work *MUCH*
better.

>
> Olle's Symmetric RTP code is what makes it work so well.  I have two IP501s
> behind a factory-default WRT54G on regular consumer ADSL hitting an Asterisk
> box on a real IP.  The WRT54 has no configuration to reflect port-forwards
> and the only thing Asterisk has is nat=yes for those two extensions.
>
> It Just Works. And I'm still stunned by it.  :-)
>
> Olle...  Thank you once again for the symmetric RTP code in Asterisk.  It's a
> godsend.
>
> -A.
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