23 Sep
2013
23 Sep
'13
3:19 p.m.
On 09/23/2013 01:18 PM, Mouse wrote:
Since VoI is basically what's been done for a long
time at the CO, only
doing it at (or at least closer to) the phone, I would guess that it's
pretty much the same as recent POTS, only with different error
characteristics. A ploss-free VoI call _should_ be able to run 56K.
I'd suspect only 28.8K or perhaps 33.6K, but not beyond that. As I
understand it, 56K is a function of the telco 64K sampling and if you're
doing 56K answer, it's done with the assistance of the local CO--i.e.,
no consumer-grade modem will operate at 56 in answer mode.
--Chuck