Re: [asterisk-users] Oslec issue
Ok Joseph. Don't worry, take your time :-) For what's concerning the quality: I can assume my phone line is an exception because it has a lot of echo. I've spent a LOT of time trying to have an SPA3102 and an HT488 working without any reasonable result. I'm playing for fun with zaptel/dahdi ec's since years and I was never able to have a satisfying result with any ec provided with it. Neither the fxotune process, neither any Tx/Rx gain or echo training parameter tuning, neither Digium people that connected to my server 3 or 4 years ago were able to completely solve any echo issue. Some years ago I had the opportunity to test on my line HPEC with a customer's box equipped with a TDM400P and I was impressed by the quality. I think OSLEC is a very good piece of code. It's working fine with my line and my Grandstream phones and, the must important thing, it's open and free to use. Sometimes I can ear some echo or strange effects at the very beginning of a call, but this is something that I can accept. In the past I tried to modify the zaptel sources in order to prevent them to free the oslec instance at each call. I think that my mods were not working on systems where more than one zap channel was present and I was not able to test it on these type of situations. Thank you and bye Marco Signorini Joseph L. Casale wrote: I spent some time to understand what's missing in the OSLEC patch for dahdi... I can confirm the same problem you reported some days ago and I need OSLEC for home personal use. Wow, Appreciate the info! I will need a few days to get this done. Out of curiosity, how do you find this ec's quality compared to the shipped modules and hpec? Thanks! jlc ___ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- ___ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [asterisk-users] Oslec issue
Hi Joseph.
I spent some time to understand what's missing in the OSLEC patch for
dahdi... I can confirm the same problem you reported some days ago and I
need OSLEC for home personal use.
For what I've understood looking at the code, there is some missing in
the dahdi_echocan_oslec.c file you can find in the
dahdi-linux/drivers/dahdi. I can list below what I did to have it
working. Actually I'm using the trunk revision 5443.
1. In the function echo_can_create i've modified the line
*ec = (struct echo_can_state *)oslec_create(ecp-tap_length,0);
with
*ec = (struct echo_can_state *)oslec_create(ecp-tap_length,
ECHO_CAN_USE_ADAPTION | ECHO_CAN_USE_NLP | ECHO_CAN_USE_CLIP |
ECHO_CAN_USE_TX_HPF | ECHO_CAN_USE_RX_HPF);
This instructs OSLEC to have a working modality properly set.
2. I've replaced the function echo_can_update with the code below:
static void echo_can_update(struct echo_can_state *ec, short *iref,
short *isig)
{
unsigned int SampleNum;
for (SampleNum = 0; SampleNum DAHDI_CHUNKSIZE; SampleNum++,
iref++)
{
short iCleanSample;
iCleanSample = (short) oslec_update((struct oslec_state
*)ec, *iref, *isig);
*isig++ = iCleanSample;
}
}
This lets the OSLEC to work on complete DAHDI_CHUNKSIZE buffer.
Please, if you have time, let me know if this solves your problem and,
if yes, I'll appreciate to have it public on trunk. I never did a commit
on asterisk svn so I need some hints on how to do it.
Thank you and best regards.
Marco Signorini.
Joseph L. Casale wrote:
Yesterday I pulled in the latest svn of Dahdi and added the files
from a recent kernel in the drivers/staging/echo structure and modified
the Kbuild file so it would compile without error. I insmod'ed the module
in, and modified my system.conf has echocanceller=oslec.
cat /proc/dahdi/1 shows:
Span 1: WCTDM/0 Wildcard TDM410P Board 1 (MASTER)
IRQ misses: 1
1 WCTDM/0/0 FXSKS (In use) (EC: OSLEC)
2 WCTDM/0/1
3 WCTDM/0/2
4 WCTDM/0/3
With the reco's from http://www.rowetel.com/ucasterisk/oslec.html#install on
configuring the chan_dahdi.conf file, the system behaves exactly as if there
is no ec enabled at all?
Are there any additional steps needed to enable oslec under dahdi, I am
guessing
I have missed something?
Thanks,
jlc
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Re: [asterisk-users] Oslec issue
I spent some time to understand what's missing in the OSLEC patch for dahdi... I can confirm the same problem you reported some days ago and I need OSLEC for home personal use. Wow, Appreciate the info! I will need a few days to get this done. Out of curiosity, how do you find this ec's quality compared to the shipped modules and hpec? Thanks! jlc ___ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
[asterisk-users] Oslec issue
Yesterday I pulled in the latest svn of Dahdi and added the files from a recent kernel in the drivers/staging/echo structure and modified the Kbuild file so it would compile without error. I insmod'ed the module in, and modified my system.conf has echocanceller=oslec. cat /proc/dahdi/1 shows: Span 1: WCTDM/0 Wildcard TDM410P Board 1 (MASTER) IRQ misses: 1 1 WCTDM/0/0 FXSKS (In use) (EC: OSLEC) 2 WCTDM/0/1 3 WCTDM/0/2 4 WCTDM/0/3 With the reco's from http://www.rowetel.com/ucasterisk/oslec.html#install on configuring the chan_dahdi.conf file, the system behaves exactly as if there is no ec enabled at all? Are there any additional steps needed to enable oslec under dahdi, I am guessing I have missed something? Thanks, jlc ___ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
