Are you running their latest firmware? They've has a release since July.

http://gigaset.com/shc/0,1935,hq_en_0_145510_rArNrNrNrN_variation%253A-5_pageType%253Adownloads_imagePos%253A0,00.html#content

The manual for these shows a central provisioning server through an
"approved list" of providers that they store. It does not seem to have a
local provisioning process. Their manual says:

http://download.gigaset.com/repository/1461/146151/A31008-M1916-R601-2-TE19_en_International.pdf

Page 138-- Says STUN needs outbound traffic to be allowed, symmetric nat to
be in place. If the phone is "remote", this could cause a problem as the
firewall where it is needs to be able to do "symmetic port nat", if I
understand siemens statement. Also, if it is remote, did you match the phone
RTP ports to sipxbridges (default 30000-31000)?

Nice looking phone, but I don't know I would want that in an enterprise,
sounds like too much trouble already. If you get it working, a wiki posting
on it would be handy. I know others have asked about Siemens gigasets on
here.

On Wed, Jan 27, 2010 at 8:01 AM, Scott Lawrence <[email protected]>wrote:

> On Wed, 2010-01-27 at 14:37 +0200, [email protected] wrote:
> > Thanks for reply and trying to help me.
> >
> > We have this phone there: Siemens Gigaset C470IP
> > I received phone settings and we are trying to understand why it is
> > rejecting the calls and why from time to time the audio is missing. But
> > this is only for inbound calls. For outgoing calls everything is ok.
> >
> > Some time it is working, some times not (no audio).
> >
> > This phone is very interesting. There is no audio at all in inbound
> > calls if we don't set STUN server on it. But we have audio on outbound
> > calls without using STUN. So we have set to use stun server on this
> > phone.
>
> In general, using STUN with sipXecs is neither needed nor helpful, and
> can cause problems.
>
> > These are these settings on this phone. Is it possible some of these to
> > produce the problems?
>
> Not that I can see.  I'd suggest setting the DTMF to "RFC 2833", since
> that's what sipXecs requires.
>
> Does the phone log anything when it's rejecting a call?  You may have to
> contact Siemens for help.
>
>
>
>
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>



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