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<DIV dir=ltr align=left><SPAN class=640021613-19092006><FONT face=Arial
color=#0000ff size=2>If WAN congestion is causing audio issues with Unity, the
it would sound like QoS settings might be off. QoS if done right, should
protect voice, no matter how much traffic is present (in my experience, you can
keep voice running smoothly, even if you have a severely overloaded WAN
connection).</FONT></SPAN></DIV><BR>
<DIV class=OutlookMessageHeader lang=en-us dir=ltr align=left>
<HR tabIndex=-1>
<FONT face=Tahoma size=2><B>From:</B> cisco-voip-bounces@puck.nether.net
[mailto:cisco-voip-bounces@puck.nether.net] <B>On Behalf Of </B>Ortiz,
Carlos<BR><B>Sent:</B> Tuesday, September 19, 2006 8:09 AM<BR><B>To:</B> Kris
Seraphine; Wes Sisk<BR><B>Cc:</B> cisco-voip@puck.nether.net; STEVEN
CASPER<BR><B>Subject:</B> Re: [cisco-voip] call quality issues between gateway
and Unity<BR></FONT><BR></DIV>
<DIV></DIV>
<DIV class=Section1>
<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">This may seem silly but
make sure that the actual files were not recorded when the WAN was congested.
We had complaints one time from a location of garbled greetings but it
turned out that the recordings were done during WAN congestion and just needed
to be recorded again….<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">Carlos<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial"><o:p> </o:p></SPAN></FONT></P>
<DIV>
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<P class=MsoNormal><B><FONT face=Tahoma size=2><SPAN
style="FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: Tahoma">From:</SPAN></FONT></B><FONT
face=Tahoma size=2><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Tahoma">
cisco-voip-bounces@puck.nether.net [mailto:cisco-voip-bounces@puck.nether.net]
<B><SPAN style="FONT-WEIGHT: bold">On Behalf Of </SPAN></B>Kris
Seraphine<BR><B><SPAN style="FONT-WEIGHT: bold">Sent:</SPAN></B> Tuesday,
September 19, 2006 12:37 AM<BR><B><SPAN style="FONT-WEIGHT: bold">To:</SPAN></B>
Wes Sisk<BR><B><SPAN style="FONT-WEIGHT: bold">Cc:</SPAN></B>
cisco-voip@puck.nether.net; STEVEN CASPER<BR><B><SPAN
style="FONT-WEIGHT: bold">Subject:</SPAN></B> Re: [cisco-voip] call quality
issues between gateway and Unity</SPAN></FONT><o:p></o:p></P></DIV>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal style="MARGIN-BOTTOM: 12pt"><FONT face="Times New Roman"
size=3><SPAN style="FONT-SIZE: 12pt">Just to update this issue, I found out that
callers hear the system prompts clear as a bell. It's only the user
greetings that are a problem. The users are recording their greetings over
the WAN using G.729 so it seems the gateway is having problems playing these out
to the PSTN user. <BR><BR>I also noticed that the gateway seems to be
hitting CSCsc12570 and calls between it and Unity are not honoring the region
settings. I'm not sure how all this fits together but hopefully an IOS
upgrade will help. <o:p></o:p></SPAN></FONT></P>
<DIV>
<P class=MsoNormal><SPAN class=gmailquote><FONT face="Times New Roman"
size=3><SPAN style="FONT-SIZE: 12pt">On 9/14/06, <B><SPAN
style="FONT-WEIGHT: bold">Wes Sisk</SPAN></B> <<A
href="mailto:wsisk@cisco.com">wsisk@cisco.com</A>>
wrote:</SPAN></FONT></SPAN><o:p></o:p></P>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt">Steven,<BR><BR>No, this is not a blanket best practice
recommendation. It was a<BR>workaround for the issue cited in that
cdets. If you have the time,<BR>the best approach is to identify the
cause of the robotic voice and <BR>modify the smallest possible set of options
to address that issue.<BR><BR>/Wes<BR><BR>STEVEN CASPER wrote:<BR>> Thanks
Wes,<BR>> This is very interesting. So is the recommendation to add "mgcp
playout<BR>> adaptive 60 40 200" to all voice gateways that allow non IP
phone users <BR>> to access Unity? I have a lot of gateways that connect
Nortel users to<BR>> Unity via QSIG gateways. We occasionally get complaints
of canned or<BR>> robotic voice quality. We are running CCM 4.1.3sr1 with
Unity 4.05.<BR>><BR>> Steve<BR>><BR>>>>> "Wes Sisk" <<A
href="mailto:wsisk@cisco.com">wsisk@cisco.com</A>> 09/14/06 9:01 AM
>>><BR>> Steven,<BR>><BR>> Thank you for the clarification.
Take a look at the Release-note of <BR>> the cited bug in bug
toolkit.<BR>><BR>> There is a different command to use with MGCP:<BR>>
mgcp playout adaptive 60 40 200<BR>><BR>> Same underlying behavior, just
modified for the call signaling<BR>> protocol.<BR>><BR>>
/Wes<BR>><BR>> On Sep 14, 2006, at 8:14 AM, STEVEN CASPER
wrote:<BR>><BR>> It is in the document Playout Delay
Enhancements:<BR>><BR>> <A
href="http://www.cisco.com/en/US/products/sw/iosswrel/ps1834/">http://www.cisco.com/en/US/products/sw/iosswrel/ps1834/</A><BR>>
products_feature_guide09186a008008033c.html<BR>><BR>><BR>> in the link
on Understanding Jitter that you posted.<BR>><BR>> <A
href="http://www.cisco.com/en/US/tech/tk652/tk698/">http://www.cisco.com/en/US/tech/tk652/tk698/</A><BR>>
technologies_tech_note09186a00800945df.shtml<BR>><BR>><BR>>
Steve<BR>><BR>>>>> "Wes Sisk" <<A
href="mailto:wsisk@cisco.com">wsisk@cisco.com </A>> 09/13/06 6:30 PM
>>><BR>> Steven,<BR>><BR>> Where do you get that playout-delay
is not supported?<BR>><BR>> /Wes<BR>><BR>> STEVEN CASPER
wrote:<BR>>> Wes,<BR>>> I see that Playout-Delay is not supported on
MGCP platforms so how <BR>> is<BR>>> jitter handled in a MGCP/Call
Manager enviroment?<BR>>><BR>>> Thanks!<BR>>>
Steve<BR>>><BR>>> Steve Casper<BR>>> Voice
Technologies<BR>>> M&T Bank<BR>>> (410) 347-6026
<BR>>><BR>>>>>> "Wes Sisk" <<A
href="mailto:wsisk@cisco.com">wsisk@cisco.com</A>> 09/11/06 7:00 PM
>>><BR>>> Kris,<BR>>><BR>>> This sounds very similar
to something we fixed long ago. Take a <BR>>
look<BR>><BR>>> at 'sh voice call' to see if it's jitter:<BR>>>
<A
href="http://www.cisco.com/en/US/tech/tk652/tk698/">http://www.cisco.com/en/US/tech/tk652/tk698/</A><BR>>>
technologies_tech_note09186a00800945df.shtml <BR>>><BR>>> CSCea35850
- Unity RTP stream has inherent jitter<BR>>><BR>>><BR>>> If
you are using non-default packetization periods watch out for<BR>>>
CSCed52913 Unity RTP stream has jitter with G.729 at 30 & 60 ms
and<BR>><BR>>> G711/30ms<BR>>><BR>>>
/Wes<BR>>><BR>>> On Sep 11, 2006, at 5:56 PM, Kris Seraphine
wrote:<BR>>><BR>>> Hi<BR>>><BR>>> I have a customer with
a multi site centralized CCM 4.13 cluster.<BR>>> The remote sites are
getting complaints of poor voice quality from<BR>>> customers when being
transferred to Unity (which is located in the<BR>>> central site)
. The callers cannot understand the greetings and <BR>>>
describe them as choppy. There are no problems with external
calls<BR>><BR>>> transferred from the remote sites to IP phones at the
central site<BR>> or<BR>><BR>>> for intersite calls. It
seems to be limited to calls where the RTP <BR>><BR>>> stream is
between a remote voice gateway and Unity. These calls
are<BR>><BR>>> G.729 so Unity has to transcode the greetings on the fly
but if that<BR>><BR>>> were the problem I'd expect remote users to have
the same problem <BR>>> when calling into check their messages or leave
messages for other<BR>>> users. Also, the Unity server is not
very heavily used; it<BR>> generally<BR>><BR>>> has no more than 9
active calls at the most. <BR>>><BR>>> I suspect the gateway might
be the problem. It's a 2851 running<BR>>> MGCP. I
guess I'd like to know if anyone agrees or disagrees with<BR>>> this
assumption. Also, I've had a lot of problems with MGCP code on
<BR>><BR>>> the ISRs. Can someone recommend an IOS version
that is stable for<BR>>> and MGCP gateway and doesn't suffer from DSP
firmware issues?<BR>>><BR>>> I should mention that Unity is version
4.04 sr1 and the gateway is<BR>>> running 12.4(5).<BR>>><BR>>>
Thanks<BR>>><BR>_______________________________________________<BR>cisco-voip
mailing list<BR><A
href="mailto:cisco-voip@puck.nether.net">cisco-voip@puck.nether.net</A><BR><A
href="https://puck.nether.net/mailman/listinfo/cisco-voip">https://puck.nether.net/mailman/listinfo/cisco-voip</A><o:p></o:p></SPAN></FONT></P></DIV>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt"><BR><BR clear=all><BR>-- <BR>kris seraphine
<o:p></o:p></SPAN></FONT></P></DIV></BODY></HTML>