asterisk users - Sep 2007 - Softphone RTP Session Start-up Delay

Hello,

I have a small LAN network where I am running a Jain-Sip softphone on two user
pc's.  These softphones are connected through Asterisk(Trixbox).  Although
the phones do work in providing an audio conversation, there is a long
delay(about 20 seconds) in the initial RTP session setup.  I have tried a few
values for the buffer length including setting it to zero.  I assumed this would
drastically reduce the delay but there was no change.  I also tried a number of
values for the minimum threshold and this did not change the amount of delay
either.  Would anyone have an idea of why this delay is occurring and possibly
how to reduce it?

Any advice would be greatly appreciated,

Thanks,

Denis

Am Montag, den 17.09.2007, 15:50 -0400 schrieb Kutman.DK at
forces.gc.ca:
> Hello,
> 
> I have a small LAN network where I am running a Jain-Sip softphone on two
user pc's.
> These softphones are connected through Asterisk(Trixbox).  Although the
phones do
> work in providing an audio conversation, there is a long delay(about 20
seconds)
> in the initial RTP session setup.  I have tried a few values for the buffer
length
> including setting it to zero.  I assumed this would drastically reduce the
delay
> but there was no change.  I also tried a number of values for the minimum
threshold
> and this did not change the amount of delay either.  Would anyone have an
idea of
> why this delay is occurring and possibly how to reduce it?  
Hello Denis,

delays in that magnitude (20 seconds or about) may be related to DNS
issues - like trying to resolve a hostname, or trying to find a hostname
for an IP address. You could try to add all relevant IPs to
the /etc/hosts file (or C:\windows\system32\drivers\etc\hosts), like

192.168.0.2 host2

and see wether that helps.

Regards,
Anselm