[cisco-voip] 4.1delay upon call connection.

[Wes Sisk]

2 different issues.

For Nick,  delay ipphone-ipphone both internal - what is the RTT between
those phones and CM?  What model phones, i.e. is a transcoder being invoked?
What is the CPU Utilization on your server?  Pls check for speed/duplex
mismatch btwn your CM servers and the attached switches.  You should never
see this much delay between 2 phones.  Only way is either network latency
cm<->phone or ccm.exe process is backed up with many signals

For Anthony the network round trip time can definitely cause delays with
h323 call setup because of the number of packets that have to be exchanged
and ACK'd.  Fast Start should bring that time down some.

/Wes

-----Original Message-----
From: Nick Marus [mailto:nmarus at gmail.com]
Sent: Monday, April 11, 2005 10:52 AM
To: Anthony Mendoza
Cc: Wes Sisk; cisco-voip at puck.nether.net; Daniel Sexton
Subject: Re: [cisco-voip] 4.1delay upon call connection.


My issue occurs on internal to internal ip phone, if that helps.

On Apr 11, 2005 10:48 AM, Anthony Mendoza <amendoza at niku.com> wrote:
> I'll check.
>
> -Anthony
>
> > -----Original Message-----
> > From: Wes Sisk [mailto:wsisk at cisco.com]
> > Sent: Monday, April 11, 2005 7:48 AM
> > To: Anthony Mendoza; Nick Marus
> > Cc: cisco-voip at puck.nether.net; Daniel Sexton
> > Subject: RE: [cisco-voip] 4.1delay upon call connection.
> >
> > Do you both have h323 fast start enabled?
> >
> > /Wes
> >
> > -----Original Message-----
> > From: cisco-voip-bounces at puck.nether.net
> > [mailto:cisco-voip-bounces at puck.nether.net]On Behalf Of
> > Anthony Mendoza
> > Sent: Monday, April 11, 2005 10:43 AM
> > To: Nick Marus
> > Cc: cisco-voip at puck.nether.net; Daniel Sexton
> > Subject: Re: [cisco-voip] 4.1delay upon call connection.
> >
> >
> > Interestingly enough, yes.  We see this between our clusters
> > in the UK
> > and US, but were told it was because we are doing this over a VPN and
> > that extra latency (the few extra ms) is what is causing it.  Also,
> > since we're doing it in this configuration they refuse to do
> > any support
> > since we can't establish and guarantee QoS between the sites.  I'd be
> > happy to hear if there was a simple/easy fix for this..  our delay is
> > usually 2-3 seconds.  Between myself and the main IT person
> > out there we
> > count on the phone to check delay.
> > --
> > Anthony Mendoza
> >
> > Nick Marus sent a message, dated 4/11/2005 7:31 AM about:
> > > Anyoe seen calls have no audio for the first 3-4 seconds of an
> > > established call with 4.1.2??
> > >
> > >
> > >
> > > --
> > > Nick Marus
> > > nmarus at gmail.com.
> > > _______________________________________________
> > > cisco-voip mailing list
> > > cisco-voip at puck.nether.net
> > > https://puck.nether.net/mailman/listinfo/cisco-voip
> > >
> >
> >
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--
Nick Marus
nmarus at gmail.com