[Asterisk-Users] Re: Phones can talk to asterisk but not each other through it

[Tony Mountifield]

In article <40618664.bb.fa8.14813 at yponeinc.com>,
 <asterisk-users at lists.digium.com> wrote:
> Tony,
> What is the BW connectivity at the [*] box?

It's lots. Much more than the broadband connections our phones are behind.
File downloads to the * box from elsewhere on the internet typically go
at several hundred kbytes/sec.

> You may try to set the GS phones to GSM codec to reduce BW,
> and see if that improves the situation.

I didn't have much success using GSM, but I'll try again.

Thanks for the reply...

Tony

> WW
> ----- Original Message Follows -----
> > I posted this a week or two ago but no replies, so trying
> > again...
> > 
> > Summary: Two phones in different locations, each behind
> > NAT, can both talk to an Asterisk server on the net, for
> > the demo or for voicemail, but can't maintain a call to
> > each other via that asterisk.
> > 
> > Original post with details:
> > 
> > I have a problem with an installation of asterisk on my
> > colo server. I have a Grandstream BT102 behind a Linux NAT
> > firewall, and my colleague also has one behind his.
> > 
> > My connection is ADSL with 512k down and 256k up. My
> > colleague's is Cable with 600k down and I don't know
> > whether it's 128k or 256k up.
> > 
> > I have the phones set up in sip.conf with nat=yes,
> > qualify=yes and canreinvite=no. Each phone can
> > successfully connect with Asterisk and dial the Asterisk
> > Demo, leave and pick up voicemail, etc.
> > 
> > However, if one phone tries to dial the other, once the
> > called phone is answered, the audio starts off very
> > stuttery and broken, and after a few seconds dies
> > completely and the call gets dropped.
> > 
> > In the asterisk log there are many entries for that time
> > saying: Recv error: Resource temporarily unavailable.
> > 
> > I am using the zaprtc timer module on the asterisk server,
> > but in any case I understood that was only required for
> > MeetMe or MOH.
> > 
> > The server system is a Duron XP 1800, with 512MB RAM,
> > running Fedora Core 1 with updates, and a standard 2.4.22
> > kernel that was recompiled only to make the RTC a module
> > instead of compiled in (so I could rmmod it and then load
> > zaprtc instead, which works fine).
> > 
> > Can anyone suggest what things I should check or change?
> > 
> > Cheers
> > Tony
> > -- 
> > Tony Mountifield
> > Work: tony at softins.co.uk - http://www.softins.co.uk
> > Play: tony at mountifield.org - http://tony.mountifield.org
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> 
> Willy Wouters
> ypOne Publishing
> 
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-- 
Tony Mountifield
Work: tony at softins.co.uk - http://www.softins.co.uk
Play: tony at mountifield.org - http://tony.mountifield.org