North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical 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. > -----Original Message----- > From: [email protected] [mailto:[email protected]] On > Behalf Of Alexei Roudnev > Sent: Friday, March 26, 2004 11:39 PM > To: Patrick Murphy; Mailing List Subscriptions; [email protected] > 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" <[email protected]> > > To: <[email protected]> > > Sent: Friday, March 26, 2004 7:54 PM > > Subject: Overflow circuit > > > > > > > > > > > > > I am looking for advice on technique or products that can > solve the > > > 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 > the terrestial T1). > > > > > > 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 > the > > > job. Is there anything else that can it with less complexity? > > > > > > Ideas or recommendations? > > > > > > > > > Regards, > > > Joe > > > > > > > > > > >
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