Eric "ManxPower" Wieling wrote:
Warren wrote:
I was just told that for my forthcoming system I will be getting a data
T-1 instead of a voice T-1. Given that all of the handsets will be voip
phones, no analog at all, do I need echo cancellation? I looked at the
voip-info wiki and it seems to me that the answer should be "no" but I
would like to confirm that.
If you never make calls to analog phones or receive calls from analog
phones, then you will never have echo.
Can you be sure that all telephones you call out there on the world
PSTN will always be digital? I didn't think so.
If you have no TDM equipment, then it is your provider's responsibility
to handle any echo that may be generated if a call is routed through the
PSTN.
There is more than one way for echo to naturally occur that have nothing
to do with TDM circuits, like bad acoustics in a room as mentioned by
another poster.
VoIP moves much of the quality needs from the center of the network to
the edges. That is, phones and gateways.
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