nanog mailing list archives
Re: Residential VSAT experiences?
From: William Herrin <bill () herrin us>
Date: Tue, 23 Jun 2015 10:24:58 -0400
On Tue, Jun 23, 2015 at 9:37 AM, Rafael Possamai <rafael () gav ufsc br> wrote:
Reading about SIP made it seem like latency alone is not an issue, aside from delays which impact verbal communication as previously mentioned. What is going to be much worse is jitter and packet loss. You can eventually get used to a significant delay, but dropped calls and chopped sound renders the service useless.
With modern software implementing a responsive jitter buffer, jitter shouldn't be much of a problem. Practical effect would be a longer delay as the receiver buffers enough packets to deal with the measured variance in receipt times. Perhaps a few chops early in the conversation as the software grows the buffer. Not all SIP implementations are equal. Try yours in a high-jitter environment and see what happens. High packet loss is deadly. That'll depend on the satellite vendor's network implementation, the weather, etc. But then high packet loss is deadly to essentially all IP networking activity. In situations where a high bit error rate (BER) is endemic, the layer-2 vendor is expected to redress that with forward error correction (FEC) and retransmission that trades jitter for loss. I have no idea which satellite vendors are better or worse about this. Regards, Bill Herrin -- William Herrin ................ herrin () dirtside com bill () herrin us Owner, Dirtside Systems ......... Web: <http://www.dirtside.com/>
Current thread:
- Re: Residential VSAT experiences?, (continued)
- Re: Residential VSAT experiences? shawn wilson (Jun 26)
- Re: Residential VSAT experiences? William Herrin (Jun 26)
- Re: Residential VSAT experiences? Gary Buhrmaster (Jun 26)
- Re: Residential VSAT experiences? shawn wilson (Jun 26)
- Re: Residential VSAT experiences? Mike Lyon (Jun 22)
- Re: Residential VSAT experiences? Dovid Bender (Jun 22)
- Re: Residential VSAT experiences? Mike Lyon (Jun 22)
- Re: Residential VSAT experiences? Hugo Slabbert (Jun 22)
- Re: Residential VSAT experiences? Mike Hale (Jun 22)
- Re: Residential VSAT experiences? Dovid Bender (Jun 22)
- Re: Residential VSAT experiences? Tim Franklin (Jun 23)
- Re: Residential VSAT experiences? Rafael Possamai (Jun 23)
- Re: Residential VSAT experiences? William Herrin (Jun 23)
- Re: Residential VSAT experiences? Mikael Abrahamsson (Jun 22)
- Re: Residential VSAT experiences? Dave Taht (Jun 22)
- Re: Residential VSAT experiences? Nicholas Oas (Jun 26)
- Re: Residential VSAT experiences? Lyndon Nerenberg (Jun 22)
- Re: Residential VSAT experiences? Dave Crocker (Jun 22)