[asterisk-users] TDM2400P

[Robson Ribeiro]

Dear Jay, maybe I would better describe the sound as "breaking" and not skipping. It is a constant thing so the person on the other side can't understand a word. It's like when you are in a bad cellphone connection. It ONLY happens and this is the weird part, when I call OUT of the TDM. When someone call IN nothing happens. The call is originating as a ZAP call on a FXSs channel and going directly to the PSTN. Now, I tried working with TX/RX But it didn’t make any difference as the issue doesn’t seem to matter if gain is higher or lower. If I was calling from a VOIP provider I could understand this as being a "bandwidth" issue. But from the PSTN to another PSTN it is very strange indeed. I tried calling you but noone answered. Will try later.

-----Original Message-----
From: asterisk-users-bounces at lists.digium.com [mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of Jay R. Ashworth
Sent: Thursday, September 21, 2006 1:23 PM
To: asterisk-users at lists.digium.com
Subject: Re: [asterisk-users] TDM2400P

On Thu, Sep 21, 2006 at 12:28:16PM -0400, Robson Ribeiro wrote:
>    Hi all, I have a TDM2400P w/ echo cancellation, 8 FXSs and 8 FXOs.
>    They are installed respectively on banks 1,2,5 and 6. The problem
>    I am having is that when I make a call using the ZAP channel, I
>    can hear perfectly but the person on the other end is hearing my
>    voice with lots of ticks. It would seem I am making this call
>    over a very bad bandwidth which is not the case since this is the
>    PSTN. My configuration files are below, I have the latest versions
>    of Zaptel, Libpri and Asterisk. I am using Polycom’s IP301 and
>    IP430 Phones. I would appreciate help since I have to put this in
>    production on Saturday.

Well, if that weren't an analog card, I'd say it sounded like clock
slip.

It could be digital clipping/overdrive; you might check your gains.

You have FXS, FXO, and SIP channels, there; which combinations cause
the clicking in the transmit audio?  Does it happen from FXS to FXO?
SIP to FXO?  SIP to SIP?

How frequently, and how regularly, are the ticks?  How loud?  How
sharp?  Can you call someone with audio experience to describe them to
you?  (If no one else, feel free to call me; I'm good at this stuff...  ;-)

Cheers,
-- jra
-- 
Jay R. Ashworth                                                jra at baylink.com
Designer                          Baylink                             RFC 2100
Ashworth & Associates        The Things I Think                        '87 e24
St Petersburg FL USA      http://baylink.pitas.com             +1 727 647 1274

	"That's women for you; you divorce them, and 10 years later,
	  they stop having sex with you."  -- Jennifer Crusie; _Fast_Women_
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