asterisk users - Dec 2004 - Asterisk + Satellite connection

Hello,

I have an Asterisk with one local Cisco ATA and one remote Cisco ATA
connected to the Asterisk, the remore connection is a satellite link
with an 900ms delay. I can make calls from the remote site to the
local site, but when try to call from local to remote it doesn't work.
The Asterisk timesout, it sais  no one answered and can?t establish
the connection.

Can anybody help me with this ?. Is there a delay parameter to set ?

Thank you

Regards, 
Federico

i am not sure about the timer but normally you would want a delay that 
is less than 500ms for good audio quality.

smadi
Federico Gonzalez wrote:
>Hello,
>
>I have an Asterisk with one local Cisco ATA and one remote Cisco ATA
>connected to the Asterisk, the remore connection is a satellite link
>with an 900ms delay. I can make calls from the remote site to the
>local site, but when try to call from local to remote it doesn't work.
>The Asterisk timesout, it sais  no one answered and can?t establish
>the connection.
>
>Can anybody help me with this ?. Is there a delay parameter to set ?
>
>Thank you
>
>Regards, 
>Federico
>_______________________________________________
>Asterisk-Users mailing list
>Asterisk-Users@lists.digium.com
>http://lists.digium.com/mailman/listinfo/asterisk-users
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>
>  
>

Federico Gonzalez wrote:
> I have an Asterisk with one local Cisco ATA and one remote Cisco ATA
> connected to the Asterisk, the remore connection is a satellite link
> with an 900ms delay.
This is the same delay I have here. Never less than 900, sometimes over 
1500 ms.
Check 
http://lists.digium.com/pipermail/asterisk-biz/2004-November/001243.html 
also.
> Can anybody help me with this ?. Is there a delay parameter to set ?
This is my sip.conf setup for this phone over satellite (a Cisco 7960 to 
one server and a GS-102 to another server):

[1234]
type=friend
username=1234
auth=md5
secret=supers
canreinvite=no
reinvite=no
host=dynamic
dtmfmode=rfc2833
qualify=1200
mailbox=1234
disallow=all
allow=g729
nat=yes
context=mycontext
callerid="My Name" <1234>

There have been prior discussion on this on the list -- just google for
"starband site:lists.digium.com" and you should find it.  IIRC, there
has been some sporadic success, but overwhelmingly, satellite-based VOIP
connections are not considered feasible.
> -----Original Message-----
> From: Federico Gonzalez [mailto:yakare@gmail.com] 
> Sent: Wednesday, December 01, 2004 4:27 PM
> To: Asterisk-Users@lists.digium.com
> Subject: [Asterisk-Users] Asterisk + Satellite connection
> 
> 
> Hello,
> 
> I have an Asterisk with one local Cisco ATA and one remote 
> Cisco ATA connected to the Asterisk, the remore connection is 
> a satellite link with an 900ms delay. I can make calls from 
> the remote site to the local site, but when try to call from 
> local to remote it doesn't work. The Asterisk timesout, it 
> sais  no one answered and can?t establish the connection.
> 
> Can anybody help me with this ?. Is there a delay parameter to set ?
> 
> Thank you
> 
> Regards, 
> Federico
> _______________________________________________
> Asterisk-Users mailing list
> Asterisk-Users@lists.digium.com 
> http://lists.digium.com/mailman/listinfo/aster> isk-users
> To 
> UNSUBSCRIBE or update options visit:
>    
http://lists.digium.com/mailman/listinfo/asterisk-users

Hermann Wecke wrote:
> This is the same delay I have here. Never less than 900, sometimes over 
> 1500 ms.
> Check 
> http://lists.digium.com/pipermail/asterisk-biz/2004-November/001243.html 
> also.
What company are you using for your service?

"Jay Milk" <jay@skimmilk.net> writes:
> There have been prior discussion on this on the list -- just google for
> "starband site:lists.digium.com" and you should find it.  IIRC,
there
> has been some sporadic success, but overwhelmingly, satellite-based VOIP
> connections are not considered feasible.
My company does IAX2/GSM over satellite links for many sites
throughout the world on through different satellite providers.  It is
fairly reliable.  There is obviously a lot of noticeable lag with
700ms RTTs, but you get used to that right away.

As long as there is a guarantee as to the minimum amount of bandwidth
your provider will give you, VoIP is feasible over satellite links.

Once the next generation of jitter buffer, timing, etc. gets finished
in asterisk, things will get even better over sat links and less than
desirable WAN paths.
-- 
Matt Ranney - mjr@ranney.com

I agree with Matt we are running traffic between the U.S. & Iraq over
a 10 meg link with no serious issues. All parties understand what is
involved
but, its helps to have satellite people on staff plus clients who are
willing to
pay for a quality link.

Brandon Patterson
> As long as there is a guarantee as to the minimum amount of bandwidth
> your provider will give you, VoIP is feasible over satellite links.
>
> Once the next generation of jitter buffer, timing, etc. gets finished
> in asterisk, things will get even better over sat links and less than
> desirable WAN paths.
> -- 
> Matt Ranney - mjr@ranney.com