25 Sep
2013
25 Sep
'13
7:34 a.m.
On Tue, Sep 24, 2013 at 06:51:13PM -0400, Steven Hirsch wrote:
Yes. The send and receive channels are coded and transmitted independently.
This is all in the digital domain and is a solved problem with standard
solutions.
The hard bit is the analogue side, which is not so amenable to corner-cutting,
and bad designs can cause audio to leak from speaker to microphone. An
unsophisticated echo-canceller trying to paper over this bad design will
effectively render it half-duplex.
So don't buy one of those cheap and nasty handsets. You get what you pay for.
On Mon, 23 Sep 2013, Peter Corlett wrote:
[...]
The state of
the art in VoIP and cellular is *better* than POTS lines.
Is the state-of-the-art
actually full-duplex instead of "first talker mutes
the other guy.."?