Re: Meetme voice quality problems

3 msg	Server Compatibility List for Asterisk
17 msg	pulling my hair out over voicemail
3 msg	How to get called number in featuremap
6 msg	CallerID shows wrong values in manager interface
2 msg	Default delay time for Attended call transfer
3 msg	G729 version to be downloaded for my machines
1 msg	calls get stuck in the asterisk box
1 msg	OT - Looking for used 2 FXS port pci card
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1 msg	conf meetme all exited and still active
3 msg	Unicall CRN 32769 - far disconnectedcause=Switc...
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5 msg	func_odbc - trouble

Meetme voice quality problems
\ Tomasz Zieleniewski (30 Jan 2008)
. \ Franklin Webb (30 Jan 2008)
. . \ Dan Austin (30 Jan 2008)
. . . \ Tomasz Zieleniewski (31 Jan 2008)
. \ Matthew J. Roth (30 Jan 2008)
. . \ Tomasz Zieleniewski (31 Jan 2008)
. . . \ Matthew J. Roth (31 Jan 2008)
. . . . \ Administrator TOOTAI (1 Feb 2008)
. . . . . \ Matthew J. Roth (1 Feb 2008)
. . . . . . \ Administrator TOOTAI (2 Feb 2008)
. . . . . . . \ Jaswinder Singh (2 Feb 2008)

1 msg	No audio one way
2 msg	Using two SIP-Domains with asterisk
7 msg	Can't read environment variable
2 msg	Facing problem in installing asterisk-addons
12 msg	Problem with DTMF dialing
3 msg	sipsock_read: BAD! BAD! BAD!

Subject:	Re: Meetme voice quality problems
Group:	Asterisk-users
From:	Matthew J. Roth
Date:	31 Jan 2008

Tomasz Zieleniewski wrote:
> ztttest results show value below 99,98:
>
> asterisk$ ./zttest -v -c 5
> <snip>
> --- Results after 11 passes ---
> Best: 50.003 -- Worst: 49.612 -- Average: 49.931827, Difference:
> 49.931827
This is the first thing I would address. Get that average to at least
99.98% and it's likely that your problem will go away.
> Do You know how can I check and set kernel timer frequency?
You can check the timer frequency as follows:

# grep -e "^CONFIG_HZ" /boot/config-`uname -r`
CONFIG_HZ_1000=y
CONFIG_HZ=1000

Setting it requires configuring and rebuilding the kernel. Try setting
"CONFIG_HZ=1000" and checking the results of zttest. Depending on how
new your kernel is there are more options, but this is a good place to
start.

I settled on using an empty TDM400P as a timing source, because it is a
simple solution that "just works." This may still be your best bet, but
I'll defer judgment on that to the list because Asterisk has evolved
quite a bit since I made that decision.

Regards,

Matthew Roth
InterMedia Marketing Solutions
Software Engineer and Systems Developer

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