[asterisk-users] Call Quality / Echo / Problems

[Alexander Lopez]

Try running the echo test from both the house side and the co (outside)
side.  That will let us know where the problem is.

Post results.

Alex


> -----Original Message-----
> From: asterisk-users-bounces at lists.digium.com [mailto:asterisk-users-
> bounces at lists.digium.com] On Behalf Of Barry Fawthrop
> Sent: Monday, October 02, 2006 6:46 AM
> To: Asterisk Users Mailing List - Non-Commercial Discussion
> Subject: [asterisk-users] Call Quality / Echo / Problems
> 
> Hi all
> I'm having a problem getting usable quality from my Asterisk setup.
> 
> *SETUP*
> 2 Ghz PC with 1 GB Ram with TDM 400p 1 x FXS to route to analog phones
> in the house and 2 x FXO to receive calls and in the future faxes.
> Gentoo Linux
> 
> 
> Here is what I've done so far
> (1) Moved theTDM 400p (FXS,   , FXO, FXO) to it's own interrupt (It
was
> sharing in the past)
> cat /proc/interrupts
>            CPU0
>   0:   10236724          XT-PIC  timer
>   1:        486          XT-PIC  i8042
>   2:          0          XT-PIC  cascade
>   5:   40694267          XT-PIC  wctdm    <==============
>  10:     196233          XT-PIC  eth0
>  12:        225          XT-PIC  i8042
>  14:     247177          XT-PIC  ide0
>  15:         26          XT-PIC  ide1
> NMI:          0
> LOC:          0
> ERR:          0
> MIS:          0
> 
> (2) I'm running the latest kernel
>  uname -r
> 2.6.17-
> 
> (3) I am running the latest Asterisk
> Asterisk-1.2.12.1   Libpri-1.2.3  zaptel-1.2.8
> I compiled Zaptel with  make clean ; make linux26 ; make install
> 
> (4) ztmonitor has become my friend
> the Ring sends the VU meter off the chart, but the voice is below half
> way.
> I have tried changing the rxgain, txgain  but that doesn't improve
> much.  It raises the Volume and I can heard better.
> But the "feedback" (What I hear of myself in my analog headset) is off
> tone , too loud and poor
> 
> (5) ztspeed reports
> Count: 254114  (Not sure if that is good or bad) ???
> 
> (6) zttest reports
> --- Results after 474 passes ---
> Best: 100.000000 -- Worst: 92.578125 -- Average: 99.713476
> 
> (7) I have even run ./fxotune
> which generated /etc/fxotune.conf
> 3=3,0,0,0,0,0,0,0,0
> 4=4,0,0,0,0,0,0,0,0
> Found
> http://www.voip-info.org/wiki/view/Asterisk+fxotune
> But the -d -b 3 doesn't work only -i and -s are allowed.
> 
> 
> PROBLEM
> The Call tone has a tin can sound  (too much highs and not enough
lows,
> for those with musical backgrounds)
> The Volume has improved. It did sound like I was talking behind my
hand
> in front of my mouth, but not anymore.
> 
> The is a static HISSS that randomly comes and goes and gets so loud
that
> it drowns out whatever the calling party is trying to say.
> It can be heard on both ends but very Loud on the FXS connected phone
> 
> Any Ideas What I can try next
> 
> Thanks All
> 
> Barry
> 
> 
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