nanog mailing list archives
RE: Overflow circuit
From: "Mailing List Subscriptions" <jcc-list () thenetexpert net>
Date: Sat, 27 Mar 2004 00:13:10 -0800
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: 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.shtmlPatrick ----- Original Message ----- From: "Mailing List Subscriptions" <jcc-list () thenetexpert net> To: <nanog () merit edu> Sent: Friday, March 26, 2004 7:54 PM Subject: Overflow circuitI am looking for advice on technique or products that cansolve thefollowing challenge ... Two private line T1's between A and B - one terrestial T1with >200msRTT,the other T1 is over satellite with ~500 ms RTT. The circuits are beingusedfor mixed VoIP (70%) and data (30%) applications. Toachieve optimal voicequality, we want to route all VoIP calls over the terrestial T1 until itis"full", then divert all subsequent VoIP calls over thesatellite T1(** while existing VoIP calls continue to be routed overthe terrestial T1).So it looks like I need per-flow (based on protocol, srcIP, dst IP,src port, dst port) routing. It looks like MPLS TrafficEngineeringcan dothejob. Is there anything else that can it with less complexity? Ideas or recommendations? Regards, Joe
Current thread:
- Overflow circuit Mailing List Subscriptions (Mar 26)
- Re: Overflow circuit Patrick Murphy (Mar 26)
- Re: Overflow circuit Alexei Roudnev (Mar 26)
- RE: Overflow circuit Mailing List Subscriptions (Mar 27)
- Re: Overflow circuit Alex Rubenstein (Mar 27)
- Re: Overflow circuit Patrick Murphy (Mar 27)
- Re: Overflow circuit alex (Mar 28)
- RE: Overflow circuit Mailing List Subscriptions (Mar 27)
- Re: Overflow circuit Alexei Roudnev (Mar 26)
- Re: Overflow circuit Stephen Sprunk (Mar 28)
- RE: Overflow circuit Joe Chin (Mar 28)
- Re: Overflow circuit Alexei Roudnev (Mar 28)
- RE: Overflow circuit Joe Chin (Mar 28)
- <Possible follow-ups>
- RE: Overflow circuit Michel Py (Mar 26)
- Re: Overflow circuit W.D.McKinney (Mar 27)
- RE: Overflow circuit Michel Py (Mar 27)
(Thread continues...)
- Re: Overflow circuit Patrick Murphy (Mar 26)