Native oz PRI stack does not explicitly support 4ess but does have 5ess. You might want to try libpri to see if that makes a difference since it does do 4e. -MC Sent from my iPhone On Jun 16, 2010, at 7:26 PM, Tony Tin <tony.tin@noahmedia.com.hk> wrote:

Hi,

I'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't affect the operation of system at the beginning, but finally freeswitch stop answering call. Could anyone help me. Thanks.

1. What's the cause of this error message. 2. How to avoid.

2010-06-16 10:07:04.945026 [ERR] ozmod_isdn.c:1839 D-Chan Read Error!

Regards, Tony _______________________________________________ FreeSWITCH-users mailing list FreeSWITCH-users@lists.freeswitch.org http://lists.freeswitch.org/mailman/listinfo/freeswitch-users UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch- users http://www.freeswitch.org