On Tue, 2005-08-23 at 14:38 -0400, Andrew Kohlsmith wrote: > On Tuesday 23 August 2005 13:25, VaibhaV Sharma wrote: > > * 2 SATA Hdds with H/W RAID (RAID mainly because we plan to do a lot of > > recording on conference calls + fault tolerance) > > What good does RAID give you on writes? None whatsoever. RAID only helps > performance on reading. Fault tolerance aside, I'd get it working first, > THEN play with RAID.
I meant to point out that we use RAID not for performance reasons but to achieve some redundancy to start with, as a lot of other important systems are going to be integrated with this box. > > Changing the txgain made the echo worse so I had to settle for 0.0 as > > its value. Tried increasing / decreasing echocancel from the default 128 > > to 256 or 64/32 but echo got worse both ways. So the only change I could > > make was the rxgain so that call volume was better on this side. Tried > > changing the echotraining values too but that had no effect on the echo. > > At this point, I had rxgain set to 10.5 and txgain set to 0.0. > > Run ztmonitor and try to adjust them as described here: > > http://lists.digium.com/pipermail/asterisk-users/2004-November/071301.html Yes, I forgot to mention that I used ztmonitor while tweaking the rx/txgain numbers. The call quality has acceptable for now. > Also make these changes to your zaptel Makefile: > add > > CFLAGS+=-march=pentium4 > KFLAGS+=-march=penitum4 > > underneath the comments about zconfig.h. Also you could try defining XLAW as > described in zconfig.h to optimize for a few zap channels (not sure if few is > < 8 or not). Finally, enable MMX in zconfig.h. Considering that we would be increasing the number of incoming lines in the future, do you suggest moving to a channel bank right away? Maybe something that will do echo canceling on the hardware level? > > - Enable the AGGRESSIVE_SUPPRESSOR with MARK2 > > Agressive mode turns your phones into half-duplex devices. When you're > talking, you don't hear ANYTHING from the other side, and vice-versa. That's > why you don't hear any echo. Ah! That explains things a bit. Thanks a lot, -- VaibhaV http://vsharma.net _______________________________________________ Asterisk-Users mailing list [email protected] http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
