[Asterisk-Users] Meetme and Sipura SPA-941 - bad jitter/distortion

[Dan Austin]

Are any of the phones setup to use a codec payload of more than 20ms?
Bugid 5697 on the
bug tracker has a patch to deal with very poor MeetMe performance when
any of the participants
are using audio packetization greater than 20ms.
 
Beta1 and beta2 did not have this problem, and I am not sure about the
RC versions.  Which
codec is the 941 using?
 
Dan


________________________________

	From: asterisk-users-bounces at lists.digium.com
[mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of Ryan Booz
	Sent: Thursday, December 08, 2005 8:27 AM
	To: asterisk-users at lists.digium.com
	Subject: [Asterisk-Users] Meetme and Sipura SPA-941 - bad
jitter/distortion
	
	

	I have a new * 1.2 server running on a dual-processor machine,
1GB of RAM, Gentoo with Linux 2.6 and a Digium TDM400 (four fxo boards)
installed.  Everything has been working great until we tried our first
Meetme conference call yesterday.

	 

	I have a total of 12 extensions.  9 of them are in the office
with a direct connection to the server, all of the phones are Polycom
501s.  The three remote users have the new Sipura SPA-941.  I decided on
this phone because of the features and it was easy to setup behind NAT
(which all of these users have).  Regular calls to these users work
great with no issues at all.  It's been wonderful.

	 

	However, we had our first company conference via Meetme
yesterday, and the SPA-941s sounded horrible in the conference.  Very
distorted, jittery sound.  It was surprising and we ended up having them
call in on the POTS line and come in that way - and it sounded fine.
So, I thought maybe it was a connection issue, but tested with one of
our remote uses and have narrowed it down to the phone.  If the user
connects with X-lite to the conference room the sounds is great.  If he
then calls back with the SPA-941, the sound is horrible.  Hanging up and
dialing the extension directly to the SPA-941 sounds good as well.

	 

	Any ideas what could be going on and how to fix it.  I thought
it could be a timing thing.  The documentation on the Sipura phones is
non-existent at the moment, so I have no idea what might be able to be
changed.

	 

	I'd greatly appreciate any help or thoughts!

	 

	Ryan Booz

	Director of IT

	Good Steward Software, LLC

	111 Sowers Street, Suite 400

	State College, PA 16801

	Phone: 877-327-3702 x.26 (814-237-3744 x.26)

	Fax: 719-623-0577

	Visit us at www.energycap.com

	 

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