Hi Harold,
To get QOS you need it implemented in each network along the way. Normally
you would put your real time protocols into a separate VLAN with appropriate
QOS for your layer 2 switch etc, next step is the router with appropriate
header compression to reduce call bandwidth then the most important bit is
your ISP. Your ISP must support and honour the priority you have placed on
your voice packets and not drop etc all the way to the other end. The same
of course applies back the other way. If you are lucky enough to have all
your ducks lined up then Cisco make some very nice products in this range. I
expect the features required  start to be available in the 17xx series.

But all is not lost, if you have more bandwidth then you use then you don't
need any QOS (but its still recommended). QOS is managed unfairness which
lets your voice go first.

If your main problem is caused by http traffic then you may get away with a
proxy that you can limit bandwidth on such as Squid.
The CODEC you use is very important, if you are using G.711 then you require
a lot more available bandwidth then say G.729, roughly 80k versus 25k
without header compression.

I only have a 64kb Internet connection and run voice calls over it with very
good results most of the time. I haven't implemented any QOS
(prioritisation) yet.

-----Original Message-----
From: pic microcontroller discussion list
[mailto:PICLIST@MITVMA.MIT.EDU]On Behalf Of Harold Hallikainen
Sent: Friday, 28 May 2004 1:05 AM
To: PICLIST@MITVMA.MIT.EDU
Subject: [OT:] Router recommendations with QOS?


Pretty off topic, but this is a smart group...  I'm currently using a
Linksys BEFSR41 router on my DSL. I have a problem that when there's
traffic from my web server, upstream voice from my sip phone is
interrupted. I'm looking at the Linksys BEFSR81 router to prioritize VoIP
packets to fix this problem. Do any of you have comments on this router or
have other recommendations?

THANKS!

Harold

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