[asterisk-dev] Zaptel Issue 11153

Matthew Yingling matt at xenotran.com
Wed Nov 14 15:38:51 CST 2007

Thanks for the replies.  For anyone looking at -users, search for the
"ztdummy, zttest" thread.  That does appear to match the issue I am

The working PC is a Dell Precision M65 laptop (Core Duo based), and the
non-working PC is an HP Compaq dx2250 MT (Sempron based).

I loaded ztdummy on both machines and then ran zttest.  The working PC shows
a 99.96% accuracy and the rtc interrupt counting about 1024 per second.  The
non-working PC shows no zttest output (it just waits after the start
message) and a constant zero rtc interrupt count.

Unfortunately I won't be able to test a new kernel anytime soon to see if
that fixes this issue.  Does anyone have information on the kernel patch?


-----Original Message-----
From: asterisk-dev-bounces at lists.digium.com
[mailto:asterisk-dev-bounces at lists.digium.com] On Behalf Of Eric "ManxPower"
Sent: Wednesday, November 14, 2007 1:09 PM
To: Asterisk Developers Mailing List
Subject: Re: [asterisk-dev] Zaptel Issue 11153

There is a thread on -users this week about a no-audio issue as well as 
the solution someone found.

Tony Mountifield wrote:
> In article <003801c826df$03698a70$0a3c9f50$@com>,
> Matthew Yingling <matt at xenotran.com> wrote:
>> Hi,
>> I was testing a PC set up with Asterisk 1.4.8 and Zaptel 1.4.4 and
>> discovered that hold music would play, but anything requiring a voice
>> would hang indefinitely.  I came across this issue, which is marked
>> I am  able to replicate this exact behavior.  I am not using any zaptel
>> hardwar and if ztdummy is running, no voice prompts will play, but hold
>> music will.  If I unload ztdummy, voice prompts and music both work, but
>> MeetMe() does not.  It works whether Zaptel is loaded or not.  What is
>> interesting is that I just tried this same installation in a different PC
>> and it works fine.
>> I am running a live installation (Slax with kernel 2.6.16) of
>> Asterisk on a USB stick, so the complete OS and configuration is
>> on both systems, but one exhibits this issue while the other does not.
>> anyone suggest a way to determine whether this is a Zaptel or Linux
>> issue?
> Sounds like on the bad system ztdummy is not getting nay interrupts.
> Try running zttest on each system and see what it shows. Also check
> the output of "cat /proc/interrupts" on each system. You should have
> an entry for "rtc" counting up at about 1024 per second.
> ztdummy and zaptel should be loaded and running for the above tests.
> What is the make and model of each PC?
> Cheers
> Tony

--Bandwidth and Colocation Provided by http://www.api-digital.com--

asterisk-dev mailing list
To UNSUBSCRIBE or update options visit:

More information about the asterisk-dev mailing list