[Asterisk-Users] Managed Switches QoS to deal with network bottleneck

[Dana Harding]

Good Day Everybody,

 

I am in the process of planning a phone system for a small business (15 extensions - 4 PSTN lines [to be connected by ATAs]). The plan is to install an IP Phone everywhere there is an existing computer workstation - using the same LAN for phones and computers.

 

The layout involves workstations connected to two switches (the unmanaged 'dumb' type) and the switches linked to each other by a buried cable.  This link between the switches is a bottleneck - large file transfers through the link are common enough that a disruption to VoIP traffic is pretty much guaranteed.

 

I'm convinced that a QoS-based approach is the way to ensure file transfers do not interrupt VoIP traffic.   (not to mention the fact that I don't want to have to dig a ditch in the ground to run another cable parallel to the existing link).

 

What are your opinions and experiences with:  3COM 4500,  Linksys SRW224G4?   (The 3COM is already pushing the budget limit. I'm sure you get what you pay for with Linksys but - that being said - would it work? Decently well?)

 

Any thoughts on cheaper approaches such as: D-Link DI-102 (Little Packet Priortizer with 2 RJ45 ports),  or lower-end routers with QoS abilities like a WRT54GS?  (I'm guessing these are more likely to cause a lot more packet loss than using managed switches)

 

We are planning on using either Polycom 501, or SNOM 320/360s.  Does the switch built into the phone handle QoS for the attached computer?

 

 

 

 

Thank you for your input.





Dana Harding
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