search for: 20dbm

...tmp_out = (float)ref[i] - st->y[i+st->frame_size] to the output, I just sent st->y[i+st->frame_size] to see what was being subtracted from the microphone input. When I open this in Audacity, I see a very small signal at about -40dBm. The actual echo in my sample has a power closer to -20dBm. So, when the -40dBm estimated echo is removed from the -20dBm actual echo there is almost no perceived difference in the echo power. I'm sure that there are others on the list that have had good success with the echo cancellation module. Could anyone point me to reference test files that are...

...he output, I just sent > > st->y[i+st->frame_size] > > to see what was being subtracted from the > microphone > > input. When I open this in Audacity, I see a very > > small signal at about -40dBm. The actual echo in > my > > sample has a power closer to -20dBm. So, when the > > -40dBm estimated echo is removed from the -20dBm > > actual echo there is almost no perceived > difference in > > the echo power. > > I'm sure that there are others on the list that > have > > had good success with the echo cancellation &gt...

...t; > > to see what was being subtracted from the > > > microphone > > > > input. When I open this in Audacity, I see a > very > > > > small signal at about -40dBm. The actual echo > in > > > my > > > > sample has a power closer to -20dBm. So, when > the > > > > -40dBm estimated echo is removed from the > -20dBm > > > > actual echo there is almost no perceived > > > difference in > > > > the echo power. > > > > I'm sure that there are others on the list > that &g...

...microphone > > > > > > input. When I open this in Audacity, I > see a > > > very > > > > > > small signal at about -40dBm. The actual > echo > > > in > > > > > my > > > > > > sample has a power closer to -20dBm. So, > when > > > the > > > > > > -40dBm estimated echo is removed from the > > > -20dBm > > > > > > actual echo there is almost no perceived > > > > > difference in > > > > > > the echo power. > > >...

...gt;y[i+st->frame_size] > to the output, I just sent > st->y[i+st->frame_size] > to see what was being subtracted from the microphone > input. When I open this in Audacity, I see a very > small signal at about -40dBm. The actual echo in my > sample has a power closer to -20dBm. So, when the > -40dBm estimated echo is removed from the -20dBm > actual echo there is almost no perceived difference in > the echo power. > I'm sure that there are others on the list that have > had good success with the echo cancellation module. > Could anyone point me to...

All, I just had the fortune to take one of the new Senao Wifi SIP phones for a short test drive. First look - it's a nice, compact phone. Weighs around 87g and roughly the size of a Nokia 6210. More on the those later. The thing that struck me was the RF power, it's rated at 100mw (20dBm). That's 10 times more than any of the other brands out on the market Cisco, WiSIP, Zyxel are all rated at 10mW. I'm not really sure if I want to stick something with that power to my ear. Assuming a reasonable antenna gain of 2.2dBi, we're talking about 22.2dBm - that's nearly...

...t; st->y[i+st->frame_size] > > > to see what was being subtracted from the > > microphone > > > input. When I open this in Audacity, I see a very > > > small signal at about -40dBm. The actual echo in > > my > > > sample has a power closer to -20dBm. So, when the > > > -40dBm estimated echo is removed from the -20dBm > > > actual echo there is almost no perceived > > difference in > > > the echo power. > > > I'm sure that there are others on the list that > > have > > > had good suc...

...Test Set and talked to the telco about access to a MilliWatt generator. They did not have one active, but they worked on it and activated the MilliWatt Generator on the exchange for me. I measured my lines and also the lines at another location I am having the same problem. The line levels were -20dbm at my office and -21.4dbm at the other location. My question is, how does this compare, what is the norm, and what is the recourse? Do I have the root of the problem or should the system be able to handle this loss of level? -- Chris Mason

...gt; I > > > see a > > > > > very > > > > > > > > small signal at about -40dBm. The > actual > > > echo > > > > > in > > > > > > > my > > > > > > > > sample has a power closer to -20dBm. > So, > > > when > > > > > the > > > > > > > > -40dBm estimated echo is removed from > the > > > > > -20dBm > > > > > > > > actual echo there is almost no > perceived > > > > > > >...

...subtracted from the > > > > microphone > > > > > input. When I open this in Audacity, I see a > > very > > > > > small signal at about -40dBm. The actual echo > > in > > > > my > > > > > sample has a power closer to -20dBm. So, when > > the > > > > > -40dBm estimated echo is removed from the > > -20dBm > > > > > actual echo there is almost no perceived > > > > difference in > > > > > the echo power. > > > > > I'm sure that there...

We are having trouble with an installation that is getting a lot of echo on some calls. The installation is all SIP phones and they have a VoIP provider. When we call through the voip provider and into another of their customers (voip throughout) there is no echo problem. If we call in their landline, through the TDM400's FXO to one of the SIP phones, there is no echo problem. Sometimes

...; > > > > very > > > > > > > > > small signal at about -40dBm. The > > actual > > > > echo > > > > > > in > > > > > > > > my > > > > > > > > > sample has a power closer to -20dBm. > > So, > > > > when > > > > > > the > > > > > > > > > -40dBm estimated echo is removed from > > the > > > > > > -20dBm > > > > > > > > > actual echo there is almost no > > perc...