-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 hmmm... I have not found this documented anywhere... ;) Can you explain the rationale a bit?
Sean David K Parker wrote: > My problem is solved by doing the following. Many thanks to Mark > Spencer for clueing me in... > > > search for the following string in wctdm. c: > > /* Enable on-hook line monitor */ > > After the "wctdm_setreg" function add the following lines: > > /* Apply negative Tx gain of 4.5db to DAA */ wctdm_setreg(wc, card, > 38, 0x14); /* 4db */ wctdm_setreg(wc, card, 40, 0x15); > /* 0.5db */ > > /* Apply negative Rx gain of 4.5db to DAA */ wctdm_setreg(wc, card, > 39, 0x14); /* 4db */ wctdm_setreg(wc, card, 41, 0x15); > /* 0.5db */ > > Save the file, and recompile zaptel > > On 12/10/05, *David K Parker* <[EMAIL PROTECTED] > <mailto:[EMAIL PROTECTED]>> wrote: > > I hadn't heard of fxotune. I'll check it out. > > I had a little bit better luck today after replacing a 25 ft cable > on the pstn side with a 7 ft cable. I'm beginning to wonder about > ztmonitor though. Before replacing the cable I had to adjust Rx to > 22 and Tx to - 7.5. Ztmonitor still showed the Tx gain to be hot. > If I went below -7.5 I couldn't complete a call. Now Rx is at 2.5 > and Tx is at 8. This is adjusted when caling the CO. When I call > anyone, the sound is low. I can adjust Rx to 4.5 and its better. > The other party hears me fine. I changed the echo canceller to > ECHO_CAN_MG2 in Zaptel and the beginning of the call isn't as bad. > If I unplug Asterisk from the PSTN and use the analog direct to the > telco the quality is fine. Asterisk is poor in comparison on PSTN. > Any calls with Asterisk to my Teliax ld trunk are fine. > > > On 12/9/05, *Matthew Fredrickson* < [EMAIL PROTECTED] > <mailto:[EMAIL PROTECTED]>> wrote: > > > On Dec 9, 2005, at 9:48 AM, David K Parker wrote: > >> I have a Digium TDM11B, I'm fighting an issue with with echo on >> the PSTN side. I run [EMAIL PROTECTED] 2.0. I have an analog phone on >> the FXS channel 1 and Telco on the FXS channel 4. I also have a >> coupe of softphones, 1 iax2, the other sip, and a LinkSys Sipura >> 941. I use a VOIP provider for long distance. I'm experiencing >> echo on all calls on any phone for calls going out over the PSTN, >> but no echo at all on Long Distance calls with my VOIP provider >> or Internal calls. I think its safe to say that echo is occuring >> on the PSTN side on channel 4. I've followed the trouble shooting >> provedures on voip-info.org <http://voip-info.org> for echo >> cancellation, even calling the local CO using ztmonitor to adjust >> rx & tx gain. The only thing I haven't tried yet is installing >> shielded cable. I use Verizon DSL for Internet and have the >> appropriate filter for my PSTN on channel 4. I'm beginning to >> wonder if the problem is due to DSL. Has anyone else had this >> experience. >> > > Have you tried running fxotune on the card? It's possible that > your echo problem is related to line impedance mismatch. For more > details, see README.fxotune in the zaptel package. > > Matthew Fredrickson > > _______________________________________________ --Bandwidth and > Colocation provided by Easynews.com <http://Easynews.com> -- > > Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: > http://lists.digium.com/mailman/listinfo/asterisk-users > > > > > ---------------------------------------------------------------------- > > > _______________________________________________ --Bandwidth and > Colocation provided by Easynews.com -- > > Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: > http://lists.digium.com/mailman/listinfo/asterisk-users -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.2 (MingW32) Comment: Using GnuPG with Thunderbird - http://enigmail.mozdev.org iD8DBQFD7QTCy9wPyZpnL2URAqhbAJsFameIwYh9qTwLYGc5k1JFXTw5vgCeLKM4 zScxRwbwB1acgbTgBeQIUYE= =Hw91 -----END PGP SIGNATURE----- _______________________________________________ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
