<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2//EN">
<HTML>
<HEAD>
<META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=us-ascii">
<META NAME="Generator" CONTENT="MS Exchange Server version 6.5.7650.28">
<TITLE>RE: Nortel 81C MSDL Trunking to Asterisk TE110P, Nortel Resetting PRI Channels</TITLE>
</HEAD>
<BODY>
<!-- Converted from text/rtf format -->
<P><FONT COLOR="#0000FF" SIZE=2 FACE="Arial">I have made the change as stated </FONT>
<BR><FONT SIZE=2 FACE="Courier New">span=1,1,0,esf,b8zs</FONT>
<BR><FONT COLOR="#0000FF" SIZE=2 FACE="Courier New">span=2,2,0,esf,b8zs</FONT>
</P>
<P><FONT SIZE=2 FACE="Courier New">>Where is your primary clock? </FONT>
<BR><FONT COLOR="#0000FF" SIZE=2 FACE="Courier New">For the PRI, coming from the Asterisk PBX</FONT>
</P>
<P><FONT SIZE=2 FACE="Courier New">>Do you have an atomic clock supplying timing to your Nortel system? </FONT>
<BR><FONT COLOR="#0000FF" SIZE=2 FACE="Courier New">No, timing picked up over the PRI from the provider </FONT>
</P>
<P><FONT SIZE=2 FACE="Courier New">>Does your Nortel get it's clock from the phone company?</FONT>
<BR><FONT COLOR="#0000FF" SIZE=2 FACE="Courier New"> Yes</FONT>
</P>
<P><FONT SIZE=2 FACE="Courier New">>Assuming one of these two is the case, and that both T1s are connected to the Nortel system, Asterisk should derive it's >clock from the Nortel system. </FONT></P>
<P><FONT COLOR="#0000FF" SIZE=2 FACE="Courier New">Timing cannot come from the type of card we are using on the Nortel side</FONT>
</P>
<P><FONT SIZE=2 FACE="Arial">Marlon Blair</FONT>
<BR><FONT SIZE=2 FACE="Arial">DOH, Network System Analyst</FONT>
<BR><FONT SIZE=2 FACE="Arial">(850) 245-4400, Cell (850) 528-4244</FONT>
<BR><FONT SIZE=2 FACE="Arial">Fax (850) 412-1148</FONT>
<BR><FONT SIZE=2 FACE="Arial">Work Hours 7 AM to 3:30 PM</FONT>
<BR><FONT SIZE=1 FACE="Tahoma">_____________________________________________ </FONT>
</P>
<P><B><I><FONT FACE="Century Gothic">==================</FONT></I></B>
<UL>
<P><B><I><FONT COLOR="#000000" SIZE=2 FACE="Garamond">MISSION: </FONT></I></B><I> <FONT COLOR="#000000" SIZE=2 FACE="Garamond">To promote and protect the health and safety of all people in Florida through the delivery of quality public health services and promotion of health care standards</FONT></I></P>
</UL>
<P><I><B><FONT COLOR="#000000" SIZE=2 FACE="Garamond">*********************************</FONT></B></I>
<UL>
<P><I><B><FONT COLOR="#808080" SIZE=1 FACE="Arial Narrow">PLEASE NOTE: Florida has a very broad public records law. Most written communications to or from State officials regarding state business are public records available to the public and media upon request. Your e-mail communications may therefore be subject to public disclosure.</FONT></B></I></P>
</UL>
<P><FONT SIZE=1 FACE="Arial">*****************************</FONT>
<BR><B><I><FONT COLOR="#808080" SIZE=1 FACE="Arial Narrow">Please call the Customer Service Center for Service Requests at 850-922-7599 or SunCom 292-7599</FONT></I></B><I></I>
</P>
<BR>
<BR>
<BR>
<P><A HREF="http://lists.digium.com/mailman/listinfo/asterisk-users"><U><FONT COLOR="#0000FF" SIZE=2 FACE="Courier New">Marlon_Blair at doh.state.fl.us</FONT></U></A><FONT SIZE=2 FACE="Courier New"> wrote on Tuesday, February 13, 2007 10:17</FONT>
<BR><FONT SIZE=2 FACE="Courier New">AM</FONT>
<BR><FONT SIZE=2 FACE="Courier New">></FONT><I><FONT SIZE=2 FACE="Courier New"> We are currently working to trunk from a Nortel 81C to an Asterisk </FONT></I>
<BR><FONT SIZE=2 FACE="Courier New">></FONT><I><FONT SIZE=2 FACE="Courier New"> Server 1.4 running on Red Hat Linux. We have two PRI trunks which </FONT></I>
<BR><FONT SIZE=2 FACE="Courier New">></FONT><I><FONT SIZE=2 FACE="Courier New"> work with the exception of the clock slips, which is causing the </FONT></I>
<BR><FONT SIZE=2 FACE="Courier New">></FONT><I><FONT SIZE=2 FACE="Courier New"> Nortel to reset the PRIs once a hour. Thanks for any suggestions.</FONT></I>
</P>
<P><FONT SIZE=2 FACE="Courier New">Assuming that 'clock slips' are the same thing as 'frame slips'....</FONT>
</P>
<P><FONT SIZE=2 FACE="Courier New">Where is your primary clock? Do you have an atomic clock supplying</FONT>
<BR><FONT SIZE=2 FACE="Courier New">timing to your Nortel system? Does your Nortel get it's clock from the</FONT>
<BR><FONT SIZE=2 FACE="Courier New">phone company? Assuming one of these two is the case, and that both T1s</FONT>
<BR><FONT SIZE=2 FACE="Courier New">are connected to the Nortel system, Asterisk should derive it's clock</FONT>
<BR><FONT SIZE=2 FACE="Courier New">from the Nortel system. </FONT>
<BR><FONT SIZE=2 FACE="Courier New">To do that you would want to set up Zaptel.conf </FONT>
<BR><FONT SIZE=2 FACE="Courier New">span=1,1,0,esf,b8zs</FONT>
<BR><FONT SIZE=2 FACE="Courier New">span=2,2,0,esf,b8zs</FONT>
</P>
<P><FONT SIZE=2 FACE="Courier New">Asterisk would then use T1 number 1 to set it's internal t1 card clock.</FONT>
<BR><FONT SIZE=2 FACE="Courier New">If T1 1 was not available, then it would use T1 2. </FONT>
</P>
<P><FONT SIZE=2 FACE="Courier New">This line from your Nortel system makes me think it is using an external</FONT>
<BR><FONT SIZE=2 FACE="Courier New">clock. If this is the case then you must have an atomic clock or some</FONT>
<BR><FONT SIZE=2 FACE="Courier New">other 'external' clock source at your location. </FONT>
</P>
<P><FONT SIZE=2 FACE="Courier New">></FONT><I><FONT SIZE=2 FACE="Courier New"> CLOK EXT</FONT></I>
</P>
<P><FONT SIZE=2 FACE="Courier New">Don Pobanz</FONT>
</P>
<BR>
<BR>
</BODY>
</HTML>