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<TITLE>Re: [cisco-voip] Nortel phones on Cisco Switch</TITLE>
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<FONT FACE="Calibri, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:11pt'>Just to help clarify that point, phones use DSPs to convert the packetized voice to an analog stream. The phone load contains the DSP firmware which phone loads can fix static issues caused by the DSP. But again, the phone DSP is an analog issue, not a QoS issue.<BR>
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Chris Ward <BR>
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<HR ALIGN=CENTER SIZE="3" WIDTH="95%"><B>From: </B>"Jason Aarons (US)" <<a href="jason.aarons@us.didata.com">jason.aarons@us.didata.com</a>><BR>
<B>Date: </B>Thu, 12 Feb 2009 11:04:01 -0500<BR>
<B>To: </B>Thomas Dupas <<a href="thomas@dupas.be">thomas@dupas.be</a>>, Morgan Andreas <<a href="morgan.andreas@gmail.com">morgan.andreas@gmail.com</a>>, <<a href="cisco-voip@puck.nether.net">cisco-voip@puck.nether.net</a>><BR>
<B>Subject: </B>Re: [cisco-voip] Nortel phones on Cisco Switch<BR>
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<FONT COLOR="#1F497D">I can’t tell you how many times I worked with TAC on “static” and it was never the 2-wire to 4-wire or any kind of impendence problem! Yet that is the first thing they say (they must be reading too many books).<BR>
<BR>
With a 7940 static noise is a problem with the phone load. <BR>
<BR>
<BR>
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</SPAN></FONT><FONT SIZE="2"><FONT FACE="Tahoma, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:10pt'><B>From:</B> <a href="cisco-voip-bounces@puck.nether.net">cisco-voip-bounces@puck.nether.net</a> [<a href="mailto:cisco-voip-bounces@puck.nether.net">mailto:cisco-voip-bounces@puck.nether.net</a>] <B>On Behalf Of </B>Thomas Dupas<BR>
<B>Sent:</B> Thursday, February 12, 2009 10:57 AM<BR>
<B>To:</B> Morgan Andreas; <a href="cisco-voip@puck.nether.net">cisco-voip@puck.nether.net</a><BR>
<B>Subject:</B> Re: [cisco-voip] Nortel phones on Cisco Swtich<BR>
</SPAN></FONT></FONT><FONT FACE="Times New Roman"><SPAN STYLE='font-size:12pt'> <BR>
</SPAN></FONT><FONT FACE="Calibri, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:11pt'><BR>
</SPAN></FONT><FONT SIZE="2"><FONT FACE="Tahoma, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:10pt'>Hi,<BR>
</SPAN></FONT></FONT><FONT FACE="Calibri, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:11pt'><BR>
</SPAN></FONT><FONT FACE="Times New Roman"><SPAN STYLE='font-size:12pt'> <BR>
</SPAN></FONT><FONT FACE="Calibri, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:11pt'><BR>
</SPAN></FONT><FONT SIZE="2"><FONT FACE="Tahoma, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:10pt'>First of all, static noise looks like an impedance problem/mismatch on the PSTN/pots side, and not like a QoS problem.<BR>
</SPAN></FONT></FONT><FONT FACE="Calibri, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:11pt'><BR>
</SPAN></FONT><FONT FACE="Times New Roman"><SPAN STYLE='font-size:12pt'> <BR>
</SPAN></FONT><FONT FACE="Calibri, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:11pt'><BR>
</SPAN></FONT><FONT SIZE="2"><FONT FACE="Tahoma, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:10pt'>But anyway, the QoS setup would be similar to Cisco phones:<BR>
</SPAN></FONT></FONT><FONT FACE="Calibri, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:11pt'><BR>
</SPAN></FONT><FONT SIZE="2"><FONT FACE="Tahoma, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:10pt'>- I assume the phone will send out 802.1p/dscp markings<BR>
</SPAN></FONT></FONT><FONT FACE="Calibri, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:11pt'><BR>
</SPAN></FONT><FONT SIZE="2"><FONT FACE="Tahoma, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:10pt'> - if so you need to configure the switch to trust those markings<BR>
</SPAN></FONT></FONT><FONT FACE="Calibri, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:11pt'><BR>
</SPAN></FONT><FONT SIZE="2"><FONT FACE="Tahoma, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:10pt'> - if not you need to define a policy to match that traffic (based on the incoming port, ip, protocol or ...) and mark it yourself<BR>
</SPAN></FONT></FONT><FONT FACE="Calibri, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:11pt'><BR>
</SPAN></FONT><FONT SIZE="2"><FONT FACE="Tahoma, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:10pt'>- you need to assign those markings to the (hw-)queues of your choice on the interface on the switches<BR>
</SPAN></FONT></FONT><FONT FACE="Calibri, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:11pt'><BR>
</SPAN></FONT><FONT SIZE="2"><FONT FACE="Tahoma, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:10pt'>- you need to define LLQ on the routers to assign priority bandwidth to those packets/markings<BR>
</SPAN></FONT></FONT><FONT FACE="Calibri, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:11pt'><BR>
</SPAN></FONT><FONT FACE="Times New Roman"><SPAN STYLE='font-size:12pt'> <BR>
</SPAN></FONT><FONT FACE="Calibri, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:11pt'><BR>
</SPAN></FONT><FONT SIZE="2"><FONT FACE="Tahoma, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:10pt'>the following url will explain all the steps in detail:<BR>
</SPAN></FONT></FONT><FONT FACE="Calibri, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:11pt'><BR>
</SPAN></FONT><FONT FACE="Times New Roman"><SPAN STYLE='font-size:12pt'><a href="http://www.cisco.com/en/US/docs/switches/lan/catalyst3560/software/release/12.2_35_se/configuration/guide/swqos.html">http://www.cisco.com/en/US/docs/switches/lan/catalyst3560/software/release/12.2_35_se/configuration/guide/swqos.html</a><BR>
</SPAN></FONT><FONT FACE="Calibri, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:11pt'><BR>
</SPAN></FONT><FONT FACE="Times New Roman"><SPAN STYLE='font-size:12pt'> <BR>
</SPAN></FONT><FONT FACE="Calibri, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:11pt'><BR>
</SPAN></FONT><FONT SIZE="2"><FONT FACE="Tahoma, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:10pt'>Best Regards,<BR>
</SPAN></FONT></FONT><FONT FACE="Calibri, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:11pt'><BR>
</SPAN></FONT><FONT FACE="Times New Roman"><SPAN STYLE='font-size:12pt'> <BR>
</SPAN></FONT><FONT FACE="Calibri, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:11pt'><BR>
</SPAN></FONT><FONT SIZE="2"><FONT FACE="Tahoma, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:10pt'>Thomas<BR>
</SPAN></FONT></FONT><FONT FACE="Calibri, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:11pt'>
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<FONT SIZE="2"><FONT FACE="Tahoma, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:10pt'><B>Van:</B> <a href="cisco-voip-bounces@puck.nether.net">cisco-voip-bounces@puck.nether.net</a> [<a href="cisco-voip-bounces@puck.nether.net">cisco-voip-bounces@puck.nether.net</a>] namens Morgan Andreas [<a href="morgan.andreas@gmail.com">morgan.andreas@gmail.com</a>]<BR>
<B>Verzonden:</B> donderdag 12 februari 2009 16:48<BR>
<B>Aan:</B> <a href="cisco-voip@puck.nether.net">cisco-voip@puck.nether.net</a><BR>
<B>Onderwerp:</B> [cisco-voip] Nortel phones on Cisco Swtich<BR>
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I have a Nortel BCM200 phone system w/ I2002 & I2004 phones. We are needing to configure QOS on the 3560Gs they have in place for their Nortel phones. They are currently complaining of static on all the phone lines including their intercom system (thru the Nortel phone system). We have them Vlan'd out (voice/data) but not sure of the commands to enable the QOS on switch for the phones. Does anyone happen to have any incite as to what needs to be done in order to enable the QOS for these phones? Any help would be appreciated.<BR>
<BR>
Thanks<BR>
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