-----Original Message----- From: Mailing List Subscriptions [mailto:jcc-list@thenetexpert.net] Sent: Saturday, March 27, 2004 08:13 AM To: nanog@merit.edu Subject: RE: Overflow circuit
I have been doing VoIP over sat to northern Canada and Latin America for more than five years now, using Cisco routers with analog and digital voice ports, and also IP phones. Other than the inevitable lag due to 500+ ms RTT, the voice quality with the G.729 codec has been good. I have lost count of the number of mining operations in northern Canada that rely in VoIP over sat for communication with the civilized world. Some of the bigger operations have in excess of 500+ Cisco IP phones.
Alaska has a lot connections doing VoIP over Sat also. Most of the state is served by Sat connections, being the largest state in the U.S. Dee
-----Original Message----- From: owner-nanog@merit.edu [mailto:owner-nanog@merit.edu] On Behalf Of Alexei Roudnev Sent: Friday, March 26, 2004 11:39 PM To: Patrick Murphy; Mailing List Subscriptions; nanog@merit.edu Subject: Re: Overflow circuit
VoIP over satellite? I am very sceptical about it. Better, forget such idea.
You may want to look at using H.323 gatekeepers with CAC (Call Admission Control).
Here is a link to a Whitepaper on this Subject.
http://www.cisco.com/en/US/partner/tech/tk652/tk701/technologi es_white_paper09186a00800da467.shtml
Patrick
----- Original Message ----- From: "Mailing List Subscriptions" <jcc-list@thenetexpert.net> To: <nanog@merit.edu> Sent: Friday, March 26, 2004 7:54 PM Subject: Overflow circuit
I am looking for advice on technique or products that can
following challenge ...
Two private line T1's between A and B - one terrestial T1 with >200 ms RTT, the other T1 is over satellite with ~500 ms RTT. The circuits are being used for mixed VoIP (70%) and data (30%) applications. To achieve optimal voice quality, we want to route all VoIP calls over the terrestial T1 until it is "full", then divert all subsequent VoIP calls over the satellite T1 (** while existing VoIP calls continue to be routed over
So it looks like I need per-flow (based on protocol, src
IP, dst IP,
src port, dst port) routing. It looks like MPLS Traffic Engineering can do
solve the the terrestial T1). the
job. Is there anything else that can it with less complexity?
Ideas or recommendations?
Regards, Joe
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W.D.McKinney