[Asterisk-Users] QoS in asterisk

[Kevin Walsh]

matt.riddell at sineapps.com wrote:
> On 12 Jul 2004 at 8:22, Andrew Kohlsmith wrote:
> > Why not just work with qualify?  If the connection is too lagged *
> > won't make the call through it (although if the link BECOMES laggy it
> > will continue to use the connection).
> >
> Qualify will only stop the call going through if for example the ping
> is above 200ms.  I find most of my problems come from fluctuating
> ping times (~100ms) than from a stable high ping.
> 
Well, the default for "qualify = yes" is 2000ms.  You can specify
any value you like, such as "qualify = 1000".

I find that the default is good enough for me;  On the links I use,
the ping time is either good, or it's very bad (usually because the
remote service is down).

Dial() will "fall through" if a link is down, so I use this, along
with qualify, to specify a number of routes for each dialplan entry.
This allows a transparent failover if a link is down.  It doesn't help
if a link goes down, or becomes laggy, when a call is in progress.
Luckily that sort of thing is rare with the services I use.

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