[Serusers] Call connections take too long

[Andres]

To add a comment here...we have seen some cases where the UA (ATA186) 
introduces a 3-5 second delay when a call is coming in.  A sniffer trace 
revealed that when the call came in, it immediately tried to contact the NTP 
server (for the Caller ID time).  The server did not respond so the delay was 
introduced while the ATA186 was waiting for this NTP response.  If we change 
the NTP server config on the ATA to point to a correct one then the delay is 
removed.

Regards,
Andres
http://www.telesip.net

On Monday 22 December 2003 15:10, Klaus Darilion wrote:
> Hi!
>
> Sorry, I haven't understand your setup! Please take a look at the
> follwing figure. Where is the great delay? Between which messages?
>
> UA 1                    proxy                      UA2
>
>  |1. INVITE               | 2. INVITE               |
>  | -------------------->  | ----------------------> |
>  |
>  | 4. 180 Ringing         | 3. 180 Ringing          |
>  | <-------------------   | <---------------------  |
>  |
>  |
>  | 6. 200 OK              | 5. 200 OK               |
>  | <--------------------  | <---------------------  |
>  |
>  |
>  | 7. ACK                 | 8. ACK                  |
>  | ------------------>    | --------------------->  |
>
> regards,
> Klaus
>
> > -----Original Message-----
> > From: jerk face [mailto:jerkface2098 at yahoo.com]
> > Sent: Monday, December 22, 2003 9:01 PM
> > To: Klaus Darilion
> > Cc: serusers at lists.iptel.org
> > Subject: RE: [Serusers] Call connections take too long
> >
> >
> > My setup:
> > I use a proxy for dialing.  The proxy has a static IP
> > address.  The callee can be behind a NAT or on a
> > static IP address and the call will take a long time
> > to connect.
> > I have watched the traffic at the caller end and it is
> > the same (long pause).
> >
> > Any other possibilities?
> >
> > Thank you for your time.
> >
> > --- Klaus Darilion <darilion at ict.tuwien.ac.at> wrote:
> > > That all depends on your setup.
> > >
> > > Do you use direct IP dialing or do you use a proxy?
> > > Where is the proxy -
> > > in your local network or somewhere in the public
> > > internet? Where is the
> > > callee located - same network or somewhere else? It
> > > might be also useful
> > > to watch the network traffic at the callees site and
> > > at the ser proxy.
> > >
> > > Klaus
> > >
> > > > -----Original Message-----
> > > > From: jerk face [mailto:jerkface2098 at yahoo.com]
> > > > Sent: Monday, December 22, 2003 6:23 PM
> > > > To: Klaus Darilion
> > > > Cc: serusers at lists.iptel.org
> > > > Subject: RE: [Serusers] Call connections take too
> > >
> > > long
> > >
> > > > I ran ngrep -d eth0 X.X.X.X (Where X.X.X.X is my
> > >
> > > IP
> > >
> > > > address) and I didn't get a lot of DNS queries.  I
> > > > couldn't see any activity on my IP address until I
> > > > heard a ring (after about 15-20 seconds).
> > > >
> > > > What would be some other causes for this problem?
> > > >
> > > > Thank you for your time.
> > > >
> > > > --- Klaus Darilion <darilion at ict.tuwien.ac.at>
> > >
> > > wrote:
> > > > > There can be a lot of issues, e.g. I often find
> > >
> > > long
> > >
> > > > > call setup delays
> > > > > caused by several DNS lookups (either by the
> > >
> > > client
> > >
> > > > > or the proxy) which
> > > > > may take some time if the DNS server is slow.
> > > > >
> > > > > You would have to use ethereal (or other packets
> > > > > sniffer) and watch all
> > > > > traffic related to your call to resolve this
> > >
> > > issue.
> > >
> > > > > Klaus
> > > > >
> > > > > > -----Original Message-----
> > > > > > From: jerk face
> > >
> > > [mailto:jerkface2098 at yahoo.com]
> > >
> > > > > > Sent: Monday, December 22, 2003 6:05 PM
> > > > > > To: serusers at lists.iptel.org
> > > > > > Subject: [Serusers] Call connections take too
> > >
> > > long
> > >
> > > > > > I have noticed that when I attempt to call
> > >
> > > another
> > >
> > > > > > user it takes a long time to make the
> > >
> > > connection.
> > >
> > > > > > I'm guessing this is a configuration issue
> > >
> > > since I
> > >
> > > > > > have an ADSL connection.  Does anybody know
> > >
> > > how I
> > >
> > > > > can
> > > > >
> > > > > > solve this problem?
> > > > > >
> > > > > > Thank you for your time.
> > > >
> > > > __________________________________
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