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<DIV><SPAN class=531291518-24022006><FONT face=Arial color=#0000ff size=2>The
codec itself is not as important as the sample period of the codec. All
things being equal, if G.711 sounds better than G.729 over a LAN, the same will
be true over satellite, just more delay. </FONT></SPAN></DIV>
<DIV><SPAN class=531291518-24022006><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=531291518-24022006><FONT face=Arial color=#0000ff size=2>The
best thing you can do is try to increase the sample size so more of your data is
payload and not Layer2/Layer3 headers. Simply increasing your sample rate
from 30ms to 60ms cuts your packetization rate in half, which will in turn,
reduce the amount of bandwidth required to maintain the RTP stream. It
also depends on the type of satellite technology you are using. If
you are going up over Inmarsat, and you are getting a dedicated ISDN 64k
B-channel. Therefore, your chances of packet loss are far less than
some other packet-switched based systems. It's all relative.
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size=2></FONT></SPAN> </DIV>
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<DIV class=OutlookMessageHeader lang=en-us dir=ltr align=left><FONT
face=Tahoma size=2>-----Original Message-----<BR><B>From:</B>
cisco-voip-bounces@puck.nether.net [mailto:cisco-voip-bounces@puck.nether.net]
<B>On Behalf Of </B>Bob A. Bowie<BR><B>Sent:</B> Thursday, February 23, 2006
8:57 PM<BR><B>To:</B> cisco-voip@puck.nether.net<BR><B>Subject:</B>
s::[cisco-voip] Cisco phone protocol satellite<BR><BR></FONT></DIV>
<DIV><FONT face=Arial size=2>Which protocol, G.711 or G.729 would be best for
usage on a satellite connection with close to</FONT></DIV>
<DIV><FONT face=Arial size=2>1 second round trip delay. Would the G.711
be more resilent to lost packets, when a packet is </FONT></DIV>
<DIV><FONT face=Arial size=2>lost I lose more info </FONT><FONT face=Arial
size=2>on the G.729?</FONT></DIV></BLOCKQUOTE></BODY></HTML>