Please pastebin the entire freeswitch log,  openzap.conf, openzap.conf.xml, so that someone can look into it and respond.<br><br><br><div class="gmail_quote">On Thu, Jun 17, 2010 at 7:56 AM, Tony Tin <span dir="ltr">&lt;<a href="mailto:tony.tin@noahmedia.com.hk">tony.tin@noahmedia.com.hk</a>&gt;</span> wrote:<br>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">Hi,<br><br>I&#39;ve Digium TE220p and 4ess ISDN with openzap native pri stack. I found there are a lot of errors as below in the freeswitch.log. It seems that it doesn&#39;t affect the operation of system at the beginning, but finally freeswitch stop answering call. Could anyone help me. Thanks.<br>

<br>1. What&#39;s the cause of this error message.<br>2. How to avoid.<br><br>2010-06-16 10:07:04.945026 [ERR] ozmod_isdn.c:1839 D-Chan Read Error!<br><br><br>Regards,<br><font color="#888888">Tony<br>
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