search for: 1004hz

Hi all, Several months ago we built an * box with a quad-FXO tdm400p (REV e/f). >From the get-go, there has been a problem where occasionally (2-3 times a week) zaptel/* will not detect the ringing on a line. (The call will ring through to telco voicemail). The problem is not specific to a single line or FXO port on the tdm400p. I have 2 theories: #1 - the ring voltage for some calls is

Hi, I would like to tune rx/tx gains using dahdi-monitor for a system which will be connected to french PSTN. I'm not aware of any public phone number in France I could call to get a "normalized 1004Hz signal". My questions are : 1. Does such numbers exist ? Is there a directory somewhere listing some of them ? Do you think regulations could make providing such numbers mandatory for (some) Telcos ? 2. Does it make to use a number aboard instead if I can't find any local ones ? I don...

Hello, In my quest to figure out the source of the random echo on our shiny new asterisk install, I have been using ztmonitor on the TDM400p channels for the good part of today. I have 2 TDM400p cards with 8 FXO modules and 6 pots lines connected to them (last 2 channels are unused but configured in zaptel). Even when the lines are onhook, the Tx values settle down to 0 but the Rx values still

...g). I have disabled everything that is not needed and I do not believe I have any IRQ problems and I am NEVER wrong ;). Calls are crisp and clear. . No snap, crackle, pop. It would be a beautiful thing if not for the echo. To get the RX/TX levels, run "ztmonitor 1 -vv", dial a telco 1004hz 0dbm test phone # and set the quantitative RX number to around 14500. With 2 lines (which I don't have) you test the TX level by looping out to the other PSTN. Without a second line you do the simple ztmonitor test for the TX levels. http://www.voip-info.org/tiki-index.php?page=Asterisk+zapat...

...spare time (ha ha ha) I should really learn how to > > code this stuff... > > > > JT > > The above "feature" request has been entered as bug #2023. > > It also appears that VM has an issue (by itself) with recording/playing > volume. Transmitting a 1004hz tone at 0db through a ata186 (set for > -1db fxs loss), and then retreiving the same VM results in that tone > measured at ~ -10db. Doing the same from a pstn location (via TDM FXO) > suggests the same -10db loss (in addition to the pstn loss). Zapata.conf > rxgain and txgain set to...

I came into this with my eyes wide open. I have read ABSOLUTELY EVERYTHING there is to be found on the net about avoiding echo problems BEFORE I even attempted to create a production system. Since lots of people are apparently using this in production environments now I just assumed that echo IS avoidable. As others have recommended, I created a test system with the proposed production