[Asterisk-Users] IAX2 Softphone Quality & Network Cards

[Adam Robins]

We are in the process of an Asterisk call center deployment using IAX2
G711 ulaw softphones.   Outbound sound quality is terrible.  

This week we rebuilt the entire LAN with Cisco 2950-EI switches and have
employed QoS on the switches and router.  Still sounds terrible.

What we are now finding is that the network card in the PC may be the
key to the problem.  A Dell Optiplex P4 2.4GHz 512MB machine with an
onboard Intel NIC is bad, while an older Dell Dimension P3 864MHz 128MB
machine with onboard 3COM sounds good.

Has anyone out there had a similar experience?

Thanks,
Adam

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