[Asterisk-Users] Router with QoS recommendations

[Shaoul Jacobson - TELLINK]

Hi,

> I'm not sure I totally agree.
Good, we do agree on some :)
I also agree with some of your remarks
(no flame war)

> It is also useful if you control the narrowest pipe.
I agree. But I disagree about the definition of the narrowest pipe.

> A well configured router there will slow outgoing email etc 
> to preserve the quality of current VOIP sessions.
agreed

> Let's say the company buys all the ADSL lines from 
> the same provider.
Buying all connection to the same provider is a wise decision.
It does not give any guaranty but this can be discussed :)
You are also a bigger customer.
So you could negociate some QoS, sla, ... (read my thought after my sig)

Most broadband (cable, xdsl) connection should provide enough bandwidth.
If you use 70% or more of your bandwidth then I agree QoS will definitively
help. (look during peaks & for each up & down link)
Otherwise, not much.

You share the bandwidth with other customers on your provider's backbone.
And your ISP decides how to shape traffic. Some VoIP providers in the US are
suing some ISP's because their VoIP traffic is degraded. 

The situation can be even worse with a cable connection as you share the
bandwidth AT your end-point not at the backbone.


Regards, 

Shaoul Jacobson
Senior VoIP Consultant
Tellink
Tel :	+32 3 201 96 36
Fax : 	+32 3 227 09 81
e-mail	shaoul at tellink.com

PS

I have worked in close relations with some 'big' providers.
They accept sla's, backup circuits even when they know they cannot provide.
The customer is billed for this extra 'service'
Extra billing is the only extra service the customer gets.
Beside the false safety he things he got.

If an accident happens, the isp pays for the lack of service.
This is far cheaper than implementing the needed technology.

I won't give names here, but this was the ways at some big international
isp's, not a small local isp.