[Asterisk-Users] Newbie Issues => SIP won't stay connected, and IAX Unable to Create Channel

[Joe Dennick]

It sounds like a layer three problem.  Are all of the Subnet masks and
gateways configured correctly?  Obviously, you can ping, but you are
unable to connect without the ping.  It sounds like both the SIP phones
and the IAX customers are unable to find a route back to your asterisk
server, but when you ping the devices, they 'see' the route and take it.

-----Original Message-----
From: asterisk-users-admin at lists.digium.com
[mailto:asterisk-users-admin at lists.digium.com] On Behalf Of Robert
Jackson
Sent: Saturday, April 10, 2004 9:25 AM
To: asterisk-users at lists.digium.com
Subject: [Asterisk-Users] Newbie Issues => SIP won't stay connected, and
IAX Unable to Create Channel


I am terribly sorry to bother the list with such generic and bizarre
problems, but I have been racking my brain with these for the last week
working on it for at least 60 hours.  If anyone can even point me in the
right direction I would be eternally grateful.  So without further adu
here are my woes:

I have * (2004-04-09 CVS) running on a P4 1.6Ghz CPU, 512MB RAM, Debian
"Sarge", and basically no other programs (Other than the required ones
of course).  My SIP clients are 2 Win2000 machines running X-Lite, and 2
grand stream budgettone 101's.  All iptables default rules are set allow
and no other rules are entered.  The whole setup is a proof of concept
so that we can migrate our 25 agent call center app to *.

When I reboot the computer running * and run * via asterisk -vvvvgc
everything starts without any warnings, notices, or errors.  At that
point none of my SIP clients login to *.  If I do a sip debug it doesn't
even show the clients trying to connect, however on the X-Lite logs it
is sending the REGISTER message to the correct IP address.  If I ping
the client's IP address from the * server the client immediately
registers and can make calls.  If I stop pinging for at least 30 minutes
the clients are again unable to connect.  Upon discovering this I
thought that I had a physical network problem.  So I went out and got a
brand new 10/100 switch, and new network cards for the server and the PC
based clients.  After installing and configuring all the new equipment I
am in the same boat.  I simply cannot understand what is going on.  All
of the machines are on a local address scheme without any NAT's or other
firewalls in between.

The next problem that I have has to do with IAX.  I have accounts setup
with both NuFone, and VoicePulse just to try out the various services. I
have my iax.conf configure as instructed by both the wiki and from the
providers.  I also have a DID from VoicePulse so I have a register line
for that as well.  After I reboot the * server, run *, and ping the
clients both provider's work properly.  However after a certain period
of time(variable length) the register times out and VoicePulse becomes
"UNREACHABLE".  The same goes for the NuFone service.  When this happens
occasionally I get a message on the console that says "Unable to create
channel".  

I am completely at a loss.  Again I apologize for wasting your valuable
time, but I couldn't find anything that helped me either on the wiki or
the list.  

Thanks in advance,

Robert Jackson
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