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<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>When you have issues across the pstn
interfaces like ISDN PRIs you alos need to look at the following:<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>The clocking <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>========== verify by doing this<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>sh network-clocks <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'> Network Clock Configuration <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'> --------------------------- <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>
Priority Clock Source <st1:place
w:st="on"><st1:PlaceName w:st="on">Clock</st1:PlaceName> <st1:PlaceType w:st="on">State</st1:PlaceType></st1:place>
Clock Type <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>
1 E1
0/0/0
GOOD
E1 <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'> 11 Backplane
GOOD
PLL <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'> Current Primary Clock Source <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'> --------------------------- <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>
Priority Clock Source <st1:place
w:st="on"><st1:PlaceName w:st="on">Clock</st1:PlaceName> <st1:PlaceType w:st="on">State</st1:PlaceType></st1:place>
Clock Type <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>
1 E1
0/0/0
GOOD
E1 \\\<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>To configure the clocking on the voice
gateway look at a doc called:<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<h2><b><font size=5 face="Times New Roman"><span style='font-size:18.0pt'>Clocking
Configurations On Voice-Capable IOS-Based Platforms<o:p></o:p></span></font></b></h2>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>On a 2800 it would be something like
below:<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>!<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>card type e1 0 0<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>network-clock-participate wic 0 <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>network-clock-select 1 E1 0/0/0<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>network-clock-select 2 E1 0/0/1<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>!<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>isdn switch-type primary-net5<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>!<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>controller E1 0/0/0<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'> pri-group timeslots 1-31<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>can also look at the info below<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<table class=MsoNormalTable border=0 cellspacing=1 cellpadding=0 width="100%"
style='width:100.0%'>
<tr>
<td bgcolor=white style='background:white;padding:2.25pt 2.25pt 2.25pt 2.25pt'>
<p class=MsoNormal><font size=2 color=black face=Arial><span
style='font-size:10.0pt;font-family:Arial;color:black'>K58400523<o:p></o:p></span></font></p>
</td>
</tr>
<tr>
<td width="15%" bgcolor=white style='width:15.0%;background:white;padding:
2.25pt 2.25pt 2.25pt 2.25pt'>
<p class=MsoNormal><b><font size=2 color="#336666" face=Arial><span
style='font-size:10.0pt;font-family:Arial;color:#336666;font-weight:bold'>Title</span></font></b><font
size=2 color=black face=Arial><span style='font-size:10.0pt;font-family:Arial;
color:black'><o:p></o:p></span></font></p>
</td>
<td bgcolor=white style='background:white;padding:2.25pt 2.25pt 2.25pt 2.25pt'>
<p class=MsoNormal><font size=2 color=black face=Arial><span
style='font-size:10.0pt;font-family:Arial;color:black'>User experiences no
audio or one-way audio on IP phones when calls are placed across 2691 or 3700
gateways<o:p></o:p></span></font></p>
</td>
</tr>
<tr>
<td width="15%" bgcolor=white style='width:15.0%;background:white;padding:
2.25pt 2.25pt 2.25pt 2.25pt'>
<p class=MsoNormal><b><font size=2 color="#336666" face=Arial><span
style='font-size:10.0pt;font-family:Arial;color:#336666;font-weight:bold'>Core
Issue</span></font></b><font size=2 color=black face=Arial><span
style='font-size:10.0pt;font-family:Arial;color:black'><o:p></o:p></span></font></p>
</td>
<td bgcolor=white style='background:white;padding:2.25pt 2.25pt 2.25pt 2.25pt'>
<p class=MsoNormal><font size=2 color=black face=Arial><span
style='font-size:10.0pt;font-family:Arial;color:black'>No audio or one-way
audio is experienced, even though the <a
href="http://www.cisco.com/cgi-bin/Support/Cmdlookup/ios-command-lookup.pl?type=reference&query=show+call+active+voice+&paging=25&counter=0&release=123&su=Submit"
target="_new"><b><span style='font-weight:bold'>show call active voice</span></b></a>
and <a
href="http://www.cisco.com/cgi-bin/Support/Cmdlookup/ios-command-lookup.pl?type=reference&query=show+voice+dsp+&paging=25&counter=0&release=123&sa=Submit"
target="_new"><b><span style='font-weight:bold'>show voice dsp</span></b></a>
commands issued at the gateway indicate that packets are transmitted and
received. <o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-bottom:10.5pt'><font size=2 color=black
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:black'>The
most obvious symptom is the repeating clock slips on the E1 or T1 interface.
The <b><span style='font-weight:bold'>show controller</span></b> command
shows the repeating clock slips, as shown in the following example:<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=black face="Courier New"><span
style='font-size:10.0pt;font-family:"Courier New";color:black'>Router#<b><span
style='font-weight:bold'>show controller e1 0/0</span></b><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=black face="Courier New"><span
style='font-size:10.0pt;font-family:"Courier New";color:black'> E1 0/0
is up.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=black face="Courier New"><span
style='font-size:10.0pt;font-family:"Courier New";color:black'> Applique
type is Channelized E1 - balanced<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=black face="Courier New"><span
style='font-size:10.0pt;font-family:"Courier New";color:black'> No
alarms detected.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=black face="Courier New"><span
style='font-size:10.0pt;font-family:"Courier New";color:black'>
alarm-trigger is not set<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=black face="Courier New"><span
style='font-size:10.0pt;font-family:"Courier New";color:black'> Version
info Firmware: 20020812, FPGA: 11<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=black face="Courier New"><span
style='font-size:10.0pt;font-family:"Courier New";color:black'> Framing
is CRC4, Line Code is HDB3, Clock Source is Line.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=black face="Courier New"><span
style='font-size:10.0pt;font-family:"Courier New";color:black'> Data in
current interval (97 seconds elapsed):<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=black face="Courier New"><span
style='font-size:10.0pt;font-family:"Courier New";color:black'>
0 Line Code Violations, 0 Path Code Violations<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=black face="Courier New"><span
style='font-size:10.0pt;font-family:"Courier New";color:black'>
4 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=black face="Courier New"><span
style='font-size:10.0pt;font-family:"Courier New";color:black'>
4 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 0 Unavail Secs<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=black face="Courier New"><span
style='font-size:10.0pt;font-family:"Courier New";color:black'> Total
Data (last 14 15 minute intervals):<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=black face="Courier New"><span
style='font-size:10.0pt;font-family:"Courier New";color:black'>
1 Line Code Violations, 4 Path Code Violations,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=black face="Courier New"><span
style='font-size:10.0pt;font-family:"Courier New";color:black'>
<b><span style='font-weight:bold'>425 Slip Secs</span></b>, 0 Fr Loss Secs, 1
Line Err Secs, 0 Degraded Mins,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=black face="Courier New"><span
style='font-size:10.0pt;font-family:"Courier New";color:black'>
<b><span style='font-weight:bold'>427 Errored Secs</span></b>, 0 Bursty Err
Secs, 0 Severely Err Secs, 0 Unavail Secs<o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-bottom:10.5pt'><font size=2 color=black
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:black'>The
digital errors cause the fax machines to misinterpret the digital signal, and
training is unsuccessful.<o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-bottom:10.5pt'><font size=2 color=black
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:black'>The
Digital Signal Processor (DSP) resources of the Advanced Integration Module
(AIM) on a Cisco 2600 and 3700 are accessed through Time-Division
Multiplexing (TDM) based architecture. Clocking errors occur as a result of
the AIM module not being clocked from the appropriate digital line. <o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-bottom:10.5pt'><b><font size=2 color=black
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:black;
font-weight:bold'>Note:</span></font></b><font size=2 color=black face=Arial><span
style='font-size:10.0pt;font-family:Arial;color:black'> The default clocking
configuration is for the AIM module to source clock from the router
backplane. On the other hand, the digital interface defaults to clocking from
the line. In situations such as these, where digital interfaces need to
source clock across the TDM backplane, its default clocking mode needs to be
changed.<o:p></o:p></span></font></p>
</td>
</tr>
<tr>
<td width="15%" bgcolor=white style='width:15.0%;background:white;padding:
2.25pt 2.25pt 2.25pt 2.25pt'>
<p class=MsoNormal><b><font size=2 color="#336666" face=Arial><span
style='font-size:10.0pt;font-family:Arial;color:#336666;font-weight:bold'>Resolution</span></font></b><font
size=2 color=black face=Arial><span style='font-size:10.0pt;font-family:Arial;
color:black'><o:p></o:p></span></font></p>
</td>
<td bgcolor=white style='background:white;padding:2.25pt 2.25pt 2.25pt 2.25pt'>
<p class=MsoNormal><font size=2 color=black face=Arial><span
style='font-size:10.0pt;font-family:Arial;color:black'>To resolve the issue,
perform these steps: <o:p></o:p></span></font></p>
<ol start=1 type=1>
<li class=MsoNormal style='color:black;mso-margin-top-alt:auto;mso-margin-bottom-alt:
auto;mso-list:l0 level1 lfo1'><font size=2 color=black face=Arial><span
style='font-size:10.0pt;font-family:Arial'>Ensure that the <a
href="http://www.cisco.com/cgi-bin/Support/Cmdlookup/ios-command-lookup.pl?type=reference&query=clock+source+line+&paging=25&counter=0&release=123&su=Submit"
target="_new"><b><span style='font-weight:bold'>clock source line</span></b></a>
command is issued under the appropriate controller. The Voice and WAN
Interface Card (VWIC) controller configuration defaults to <b><span
style='font-weight:bold'>clock source line</span></b>. However, the
recovered clock is not used to drive the AIM module. Therefore, this
configuration is not sufficient to resolve the clock slip problem. <o:p></o:p></span></font></li>
<li class=MsoNormal style='color:black;mso-margin-top-alt:auto;mso-margin-bottom-alt:
auto;mso-list:l0 level1 lfo1'><font size=2 color=black face=Arial><span
style='font-size:10.0pt;font-family:Arial'>To allow the router to
recover the clock from the E1/T1 VWIC and pass it across the backplane
to the AIM, the <a
href="http://www.cisco.com/cgi-bin/Support/Cmdlookup/ios-command-lookup.pl?type=reference&query=network-clock-participate+&paging=25&counter=0&release=123&sa=Submit"
target="_new"><b><span style='font-weight:bold'>network-clock-participate</span></b></a>
command is added in global configuration mode. If multiple VWICS are
installed, the command is appropriately repeated. <o:p></o:p></span></font></li>
<li class=MsoNormal style='color:black;mso-margin-top-alt:auto;mso-margin-bottom-alt:
auto;mso-list:l0 level1 lfo1'><font size=2 color=black face=Arial><span
style='font-size:10.0pt;font-family:Arial'>To allow the AIM modules in a
3700 or 2691 to participate in the system clocking, the <b><span
style='font-weight:bold'>network-clock-participate</span></b> command is
added for each AIM module. <o:p></o:p></span></font></li>
<li class=MsoNormal style='color:black;mso-margin-top-alt:auto;mso-margin-bottom-alt:
auto;mso-list:l0 level1 lfo1'><font size=2 color=black face=Arial><span
style='font-size:10.0pt;font-family:Arial'>Specify the network clock
source and priority. Issue the <a
href="http://www.cisco.com/cgi-bin/Support/Cmdlookup/ios-command-lookup.pl?type=reference&query=network-clock-select&paging=25&counter=0&release=123&sa=Submit"
target="_new"><b><span style='font-weight:bold'>network-clock-select</span></b></a>
command in global configuration mode. <o:p></o:p></span></font></li>
</ol>
<p class=MsoNormal style='margin-bottom:10.5pt'><font size=2 color=black
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:black'>This
is an example of the required configuration:<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=black face="Courier New"><span
style='font-size:10.0pt;font-family:"Courier New";color:black'>Router#<b><span
style='font-weight:bold'>conf t </span></b> <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=black face="Courier New"><span
style='font-size:10.0pt;font-family:"Courier New";color:black'>Enter
configuration commands, one per line. End with CNTL/Z.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=black face="Courier New"><span
style='font-size:10.0pt;font-family:"Courier New";color:black'>Router(config)#network-clock-participate
wic 0<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=black face="Courier New"><span
style='font-size:10.0pt;font-family:"Courier New";color:black'>Router(config)#network-clock-participate
aim 0 <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=black face="Courier New"><span
style='font-size:10.0pt;font-family:"Courier New";color:black'>Router(config)#network-clock-select
1 t1 0/0 <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=black face="Courier New"><span
style='font-size:10.0pt;font-family:"Courier New";color:black'>Router(config)#^Z<o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-bottom:10.5pt'><font size=2 color=black
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:black'>Issue
the <a
href="http://www.cisco.com/cgi-bin/Support/Cmdlookup/ios-command-lookup.pl?type=reference&query=show+network-clocks+&paging=25&counter=0&release=123&sa=Submit"
target="_new"><b><span style='font-weight:bold'>show network-clocks</span></b></a>
command to confirm the system clocking, as shown in this example:<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=black face="Courier New"><span
style='font-size:10.0pt;font-family:"Courier New";color:black'>Router#<b><span
style='font-weight:bold'>show network-clocks</span></b> <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=black face="Courier New"><span
style='font-size:10.0pt;font-family:"Courier New";color:black'> Network
Clock Configuration <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=black face="Courier New"><span
style='font-size:10.0pt;font-family:"Courier New";color:black'>
--------------------------- <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=black face="Courier New"><span
style='font-size:10.0pt;font-family:"Courier New";color:black'>
Priority Clock Source <st1:place
w:st="on"><st1:PlaceName w:st="on">Clock</st1:PlaceName> <st1:PlaceType
w:st="on">State</st1:PlaceType></st1:place> Clock
Type <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=black face="Courier New"><span
style='font-size:10.0pt;font-family:"Courier New";color:black'>
0 T1
0/0
Good
T1 <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=black face="Courier New"><span
style='font-size:10.0pt;font-family:"Courier New";color:black'>
5
Backplane Good
PLL <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=black face="Courier New"><span
style='font-size:10.0pt;font-family:"Courier New";color:black'> Current
Primary Clock Source <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=black face="Courier New"><span
style='font-size:10.0pt;font-family:"Courier New";color:black'>
--------------------------- <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=black face="Courier New"><span
style='font-size:10.0pt;font-family:"Courier New";color:black'>
Priority Clock Source <st1:place
w:st="on"><st1:PlaceName w:st="on">Clock</st1:PlaceName> <st1:PlaceType
w:st="on">State</st1:PlaceType></st1:place> Clock
Type <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=black face="Courier New"><span
style='font-size:10.0pt;font-family:"Courier New";color:black'>
0 T1
0/0
Good
T1 <o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-bottom:10.5pt'><font size=2 color=black
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:black'>For
more information on synchronized clocking, refer to the <a
href="http://www.cisco.com/en/US/customer/tech/tk713/tk628/technologies_tech_note09186a008014f8a6.shtml#topic8"
target="_new">NAS Clocking Commands</a> section of <a
href="http://www.cisco.com/en/US/customer/tech/tk713/tk628/technologies_tech_note09186a008014f8a6.shtml"
target="_new">Clock Synchronization for AS5xxx Network Access Servers</a>.<o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-bottom:10.5pt'><font size=2 color=black
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:black'>For
more background information on clocking configurations, refer to <a
href="http://www.cisco.com/en/US/customer/products/hw/routers/ps259/products_tech_note09186a008031a072.shtml"
target="_blank">Clocking Configurations On Voice-Capable IOS-Based Platforms</a><o:p></o:p></span></font></p>
</td>
</tr>
</table>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<div>
<div class=MsoNormal align=center style='text-align:center'><font size=3
face="Times New Roman"><span style='font-size:12.0pt'>
<hr size=2 width="100%" align=center tabindex=-1>
</span></font></div>
<p class=MsoNormal><b><font size=2 face=Tahoma><span style='font-size:10.0pt;
font-family:Tahoma;font-weight:bold'>From:</span></font></b><font size=2
face=Tahoma><span style='font-size:10.0pt;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>Ted Nugent<br>
<b><span style='font-weight:bold'>Sent:</span></b> Wednesday, September 12,
2007 1:59 AM<br>
<b><span style='font-weight:bold'>To:</span></b> Weigand, John V.<br>
<b><span style='font-weight:bold'>Cc:</span></b> cisco-voip@puck.nether.net<br>
<b><span style='font-weight:bold'>Subject:</span></b> Re: [cisco-voip] One-way
Voice Issues</span></font><o:p></o:p></p>
</div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
<div>
<p class=MsoNormal style='background:white'><font size=3 face=Arial><span
style='font-size:12.0pt;font-family:Arial'>Some points to note.</span></font><o:p></o:p></p>
<p class=MsoNormal style='background:white'><font size=3 face=Arial><span
style='font-size:12.0pt;font-family:Arial'>You're really not experiencing a 1
way audio issue. 1 way audio is typically when the return audio stream is lost
in one direction entirely via a routing issue or similar and you have no
audio (dead air) in one direction. You are however running in a voice quality
issue that can be a pain in the ass to track down. I've run into very similar
issues a few times in the past and it has always turned out to be one of 3
issues. I'll assume that these are all external calls to or from the PSTN that
are being affected, I can't invision this occurring on an internal call unless
this audio stream was hitting a WAN or VPN link in which case it could be a QOS
issue (or lack of QOS). </span></font><o:p></o:p></p>
<p class=MsoNormal style='background:white'><font size=3 face=Arial><span
style='font-size:12.0pt;font-family:Arial'> </span></font><o:p></o:p></p>
<p class=MsoNormal style='background:white'><font size=3 face=Arial><span
style='font-size:12.0pt;font-family:Arial'>1: Bad DSPs on the Voice gateway
which explains the intermittent problem if its only one or a part of a DSP
that's bad and is only hit intermittently </span></font><o:p></o:p></p>
<p class=MsoNormal style='background:white'><font size=3 face=Arial><span
style='font-size:12.0pt;font-family:Arial'>2: Buggy code on the IOS gateway,
there were some really ugly DSP type bugs in previous code that could be
causing this. </span></font><o:p></o:p></p>
<p class=MsoNormal style='background:white'><font size=3 face=Arial><span
style='font-size:12.0pt;font-family:Arial'>3: PRI issue/provider issue, low
signal or similar on the PRI</span></font><o:p></o:p></p>
<p class=MsoNormal style='background:white'><font size=3 face=Arial><span
style='font-size:12.0pt;font-family:Arial'> </span></font><o:p></o:p></p>
<p class=MsoNormal style='background:white'><font size=3 face=Arial><span
style='font-size:12.0pt;font-family:Arial'>Out of the 3 I'd be leaning towards
bad DSPs but any of the 3 will likely require a TAC case.</span></font><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> <o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><br>
<br>
<br>
<o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><span class=gmailquote><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'>On 9/11/07, <b><span style='font-weight:bold'>Weigand,
John V.</span></b> <<a href="mailto:jvw@medicineforthedefense.com">jvw@medicineforthedefense.com</a>>
wrote:</span></font></span> <o:p></o:p></p>
<div vlink=purple link=blue>
<table class=MsoNormalTable border=0 cellspacing=0 cellpadding=0 width=659
style='width:494.25pt;border-collapse:collapse'>
<tr height=90 style='height:67.5pt'>
<td width="4%" height=90 style='width:4.0%;padding:0in 0in 0in 0in;
height:67.5pt'>
<p class=MsoNormal><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'><o:p> </o:p></span></font></p>
</td>
<td width="59%" height=90 style='width:59.0%;padding:0in 0in 0in 0in;
height:67.5pt'>
<p class=MsoNormal><!--[if gte vml 1]><v:shapetype id="_x0000_t75"
coordsize="21600,21600" o:spt="75" o:preferrelative="t" path="m@4@5l@4@11@9@11@9@5xe"
filled="f" stroked="f">
<v:stroke joinstyle="miter" />
<v:formulas>
<v:f eqn="if lineDrawn pixelLineWidth 0" />
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<v:path o:extrusionok="f" gradientshapeok="t" o:connecttype="rect" />
<o:lock v:ext="edit" aspectratio="t" />
</v:shapetype><v:shape id="_x0000_s1026" type="#_x0000_t75" alt="Litigation Management"
style='position:absolute;margin-left:0;margin-top:0;width:209.25pt;height:40.5pt;
z-index:1;mso-wrap-distance-left:0;mso-wrap-distance-top:0;
mso-wrap-distance-right:0;mso-wrap-distance-bottom:0;
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<v:imagedata src="%20" />
<w:wrap type="square"/>
</v:shape><![endif]--><![if !vml]><img width=279 height=54 src="%20"
align=left alt="Litigation Management" border=0 v:shapes="_x0000_s1026"><![endif]><font
size=3 face="Times New Roman"><o:p></o:p></font></p>
</td>
<td width="36%" height=90 style='width:36.0%;padding:0in 0in 0in 0in;
height:67.5pt'>
<p align=right style='text-align:right'><font size=3 color=navy face=Verdana><span
style='font-size:12.0pt;font-family:Verdana;color:navy'><a
href="http://www.medicineforthedefense.com/" target="_blank"><font size=2
color=olive face=Arial><span style='font-size:10.0pt;font-family:Arial;
color:olive'>Serious Medicine for the Defense ® </span></font></a></span></font><o:p></o:p></p>
</td>
<td width="1%" height=90 style='width:1.0%;padding:0in 0in 0in 0in;
height:67.5pt'>
<p class=MsoNormal><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'><o:p> </o:p></span></font></p>
</td>
</tr>
<tr height=139 style='height:104.25pt'>
<td width="100%" colspan=3 height=139 style='width:100.0%;padding:0in 0in 0in 0in;
height:104.25pt'>
<table class=MsoNormalTable border=0 cellpadding=0 width="99%"
style='width:99.0%'>
<tr>
<td width="4%" style='width:4.0%;padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'><o:p> </o:p></span></font></p>
</td>
<td width="100%" colspan=2 valign=top style='width:100.0%;padding:.75pt .75pt .75pt .75pt'>
<div>
<p><font size=2 color=black face=Verdana><span style='font-size:10.0pt;
font-family:Verdana;color:black'>Our CCM5.x system was installed by our
vendor back in February. Since then, we've had an ongoing one way voice
issue. Every so often (mostly reported by our phone receptionists, but by a
few other key users), they'll either receive or make a call, and be nearly
unable to hear the person on the other end. They can just barely make out
their voice, and adjusting the phone volume does nothing. The person on the
other end is able to hear them with no issue. <o:p></o:p></span></font></p>
<p><font size=2 color=black face=Verdana><span style='font-size:10.0pt;
font-family:Verdana;color:black'> <o:p></o:p></span></font></p>
<p><font size=2 color=black face=Verdana><span style='font-size:10.0pt;
font-family:Verdana;color:black'>We've tried swapping the phones, etc, with
no luck. I've had no formal Callmanager or even VOIP training, but I've
been able to pick up a lot, and administration of the system has fallen to
me. I found this <a
href="http://www.cisco.com/en/US/tech/tk652/tk698/technologies_tech_note09186a008009484b.shtml"
target="_blank">document</a> about troubleshooting voice issues, and (based
on my very limited knowledge), I'm wondering if it has something to do with
Media Termination Points. Based on what I've read, there's a difference
between configuring those on CCM4 and CCM5, and our vendor really knew
nothing about CCM5, and set it up as if it was CCM4. <o:p></o:p></span></font></p>
<p><font size=2 color=black face=Verdana><span style='font-size:10.0pt;
font-family:Verdana;color:black'> <o:p></o:p></span></font></p>
<p><font size=2 color=black face=Verdana><span style='font-size:10.0pt;
font-family:Verdana;color:black'>Can anyone give me some guidance on how I
can learn more about this/figure it out/any other possible ideas what could
be causing it?<o:p></o:p></span></font></p>
<p><font size=2 color=black face=Verdana><span style='font-size:10.0pt;
font-family:Verdana;color:black'> <o:p></o:p></span></font></p>
<p><font size=2 color=black face=Verdana><span style='font-size:10.0pt;
font-family:Verdana;color:black'>Thanks so much!<o:p></o:p></span></font></p>
</div>
<p class=MsoNormal><font size=3 color=navy face=Verdana><span
style='font-size:12.0pt;font-family:Verdana;color:navy'><o:p> </o:p></span></font></p>
</td>
</tr>
<tr>
<td width="4%" style='width:4.0%;padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'><o:p> </o:p></span></font></p>
</td>
<td width="45%" valign=top style='width:45.0%;padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal style='margin-bottom:12.0pt'><strong><b><font size=2
color=navy face=Verdana><span style='font-size:10.0pt;font-family:Verdana;
color:navy'>John V. Weigand</span></font></b></strong><font size=2
color=navy face=Verdana><span style='font-size:10.0pt;font-family:Verdana;
color:navy'><br>
</span></font><font size=1 color=navy face=Verdana><span style='font-size:
7.5pt;font-family:Verdana;color:navy'>Help Desk Support<br>
</span></font><font size=1 color=black face=Verdana><span style='font-size:
7.5pt;font-family:Verdana;color:black'><br>
Litigation Management Inc. <br>
<st1:Street w:st="on"><st1:address w:st="on">300 Allen-Bradley Drive <br>
Suite 200</st1:address></st1:Street><br>
<st1:place w:st="on"><st1:City w:st="on">Mayfield Heights</st1:City>, <st1:State
w:st="on">OH</st1:State> <st1:PostalCode w:st="on">44124</st1:PostalCode></st1:place></span></font><o:p></o:p></p>
</td>
<td width="51%" valign=top style='width:51.0%;padding:.75pt .75pt .75pt .75pt'>
<p><font size=1 color=black face=Verdana><span style='font-size:7.5pt;
font-family:Verdana;color:black'><br>
<br>
</span></font><font color=black face=Verdana><span style='font-family:Verdana;
color:black'><br>
</span></font><font size=1 color=black face=Verdana><span style='font-size:
7.5pt;font-family:Verdana;color:black'>Tel:</span></font><font size=1
color=navy face=Verdana><span style='font-size:7.5pt;font-family:Verdana;
color:navy'> </span></font><font size=2 color=navy face=Verdana><span
style='font-size:10.0pt;font-family:Verdana;color:navy'><br>
</span></font><font size=1 color=black face=Verdana><span style='font-size:
7.5pt;font-family:Verdana;color:black'>Fax: 440-484-2020<br>
Cell: <br>
email: <a href="mailto:jvw@medicineforthedefense.com" target="_blank"></a><a
href="mailto:jvw@medicineforthedefense.com" target="_blank"></a><a
href="mailto:jvw@medicineforthedefense.com" target="_blank"></a><a
href="mailto:jvw@medicineforthedefense.com" target="_blank"></a><a
href="mailto:jvw@medicineforthedefense.com" target="_blank"></a><a
href="mailto:jvw@medicineforthedefense.com" target="_blank"></a><a
href="mailto:jvw@medicineforthedefense.com" target="_blank"></a><a
href="mailto:jvw@medicineforthedefense.com" target="_blank"></a><a
href="mailto:jvw@medicineforthedefense.com" target="_blank"></a><a
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href="mailto:jvw@medicineforthedefense.com" target="_blank"></a><a
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href="mailto:jvw@medicineforthedefense.com" target="_blank"></a><a
href="mailto:jvw@medicineforthedefense.com" target="_blank"></a><a
href="mailto:jvw@medicineforthedefense.com" target="_blank"></a><a
href="mailto:jvw@medicineforthedefense.com" target="_blank"></a><a
href="mailto:jvw@medicineforthedefense.com" target="_blank"></a><a
href="mailto:jvw@medicineforthedefense.com" target="_blank">jvw@medicineforthedefense.com</a>
</span></font><o:p></o:p></p>
</td>
</tr>
</table>
<p class=MsoNormal><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'><o:p></o:p></span></font></p>
</td>
<td height=139 style='padding:0in 0in 0in 0in;height:104.25pt'>
<p class=MsoNormal><font size=2 face="Times New Roman"><span
style='font-size:10.0pt'><o:p> </o:p></span></font></p>
</td>
</tr>
</table>
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