[VoIP] Missed Calls

[Lee Spenadel]

Assuming this your average "run-of-the-mill" consumer router, they don't
remember anything.  If it has been provisioned with the default routing
settings, then all it's looking for is the default gateway, or the "next
hop"  in the outbound network routing chain.  The default gateway is the
ISPs router that is the next hop.  That router then forwards it to the next
hop based on what the routing tables are telling it is the best route.
Consumer routers don't run routing algorithms, such as RIP or OSPF unless
you program it to do so.  The default is to send the packet to the next hop,
or the default gateway. 

The routers on the Internet are a completely different story and they do
cache the routes to other IP networks.  I would try some basic network
diagnostics, such as seeing if someone can do a consistent tracert to your
IP.  It appears that the problem is a routing issue to your IP.  It could
also be that your IP is changing rapidly.  I had this problem with a
customer who had remote server access pegged to a dynamic dns service.
Verizon was bouncing their IP address almost every 2 minutes, making it
impossible to track the updates through dynamic dns services because that
service could not be updated sooner than every 15 minutes. 

So I would ensure that your IP is not changing repeatedly and I would check
to make sure that your IP network is reachable on a consistent basis.  

Lee

-----Original Message-----
From: voip-bounces at ckts.info [mailto:voip-bounces at ckts.info] On Behalf Of
Doug Alderdice
Sent: Tuesday, May 01, 2007 9:30 PM
To: Voice Over IP Tandem for Analog Switches
Subject: Re: [VoIP] Missed Calls

At 08:51 PM 5/1/2007 -0400, Paul Wills  wrote:
>I'm still not getting some random calls.  It appears that if I call another
>CNET exchange and they call back, they connect but if someone tries calling
>first, they get nothing.  I see no sign of an attempt if I watch the
>Asterisk CLI.

It almost sounds to me like a router issue.  You make a call from your 
system and the router "remembers" it's there.  After a while, it 
"forgets."  Are you running * within your router?  Seems like it should 
always know it's there if you are.

If it were a problem on my system, I think I'd poke around in the router 
settings and see if anything is amiss.

Doug.


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