<DIV>I appreciate that info guys. I did try an FXO Converter through an ATA186 to terminate to the PSTN which resolved the echo but I ran into DTMF issues.</DIV>
<DIV> </DIV>
<DIV>Like you I have tried every means possible to get rid of the X100P echo. Its the only thing stopping deployment.<BR><BR><B><I>"Jason A. Pattie" <pattieja@pcxperience.com></I></B> wrote:</DIV>
<BLOCKQUOTE class=replbq style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #1010ff 2px solid">-----BEGIN PGP SIGNED MESSAGE-----<BR>Hash: SHA1<BR><BR>Rich Adamson wrote:<BR>|>Hi,<BR>|>I'm thinking of purchasing a TDM400P card and was wondering if anyone has<BR>|>experienced any echo issues with phones off these cards connecting to the<BR>|>PSTN via the X100P cards?<BR>|><BR>|>I have had my fingers burnt with a Voip phone > X100P.<BR>|<BR>|<BR>| I replaced two x100p's with a tdm04b 4-port fxo card, and the echo problem<BR>| with pstn lines are absolutely no different; echo is still there and I've<BR>| spent a substantial amount of time attempting to improve it (as an ex-<BR>| telco engineer). Three pstn lines from two central offices all identical.<BR>| Attaching these same three pstn lines to a Mediatrix 1204 totally<BR>| eliminated all echo, however the 1204 had other problems that caused<BR>| me to return it to the reseller. Tried ever combination of
echo<BR>cancellation<BR>| options in Make and *.h files that folks have suggested, problem is<BR>| still there and most disturbing during the first 15 seconds of all calls.<BR>|<BR>| As a non-programmer and * user for over nine months, its my opinion<BR>(right,<BR>| or wrong) that past echo problems have had two sources; one from pstn<BR>| mismatch problems that have been heavily discussed since about September<BR>| 2003. The other source has not yet been found/diagnosed and "seems" to<BR>| be system dependent (and its not irq related either). You either have<BR>| it or you don't, and the few developers that have either the x100p or<BR>| the tdm card installed, don't seem to have the problem. Therefore<BR>diagnosing<BR>| the root cause is still waiting on someone with the problem _and_ the<BR>| programming skills.<BR><BR>I absolutely second this notion.<BR><BR>- --<BR>Jason A. Pattie<BR>pattieja@xperienceinc.com<BR>Xperience, Inc. (http://www.xperienceinc.com)<BR>-----BEGIN PGP
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