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<html lang="en"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><meta charset="UTF-8"><meta name="copyright" content="(C) Copyright 2023"><meta name="DC.rights.owner" content="(C) Copyright 2023"><meta name="DC.type" content="concept"><meta name="description" content="The TDM Sync feature provides a means to synchronise the operation of T1/E1/BRI circuits spanning across multiple units and to specify which port of a unit should be used as the reference."><meta name="prodname" content="For units with SYNC IN and SYNC OUT ports"><meta name="version" content="DGW 49.12.28842941"><meta name="platform" content="All"><meta name="DC.date.modified" content="2023-0308-2809"><meta name="DC.date.issued" content="2023-0308-2809"><meta name="DC.date.available" content="2023-0308-2809"><meta name="ChapterNumbering" content="no"><meta name="DC.format" content="HTML5"><meta name="DC.identifier" content="concept_es4_nlr_5y"><link href="https://fonts.googleapis.com/css?family=Open+Sans" rel="stylesheet"><link rel="stylesheet" type="text/css" href="https://documentation.media5corp.com/download/attachments/45482024/commonltr.css"><link rel="stylesheet" type="text/css" href="https://documentation.media5corp.com/download/attachments/45482024/custom.css"><title>Synchronising Unit Operation (TDM Sync)</title></head><body><header role="banner"><div class="topicmeta title">Synchronising Unit Operation (TDM Sync)</div><div class="topicmeta date">2023-0308-28<09</div><div class="topicmeta product">For units with SYNC IN and SYNC OUT ports</div><div class="topicmeta version">DGW 49.12.2884<2941</div><div class="topicmeta pdf"><a href="https://documentation.media5corp.com/download/attachments/45482024/Synchronising%20Unit%20Operation%20%28TDM%20Sync%29.pdf" rel="nofollow">Download PDF Document</a></div><hr><span style="float: inline-end;"></span></header><nav role="toc"><ul><li><a href="_m5html5_Synchronising_Unit_Operation_(TDM_Sync).html#concept_es4_nlr_5y">TDM Sync Feature</a><ul><li><a href="_m5html5_Synchronising_Unit_Operation_(TDM_Sync).html#task_n32_xxr_5y">Cabling Several Units for TDM Synchronisation</a></li><li><a href="_m5html5_Synchronising_Unit_Operation_(TDM_Sync).html#task_bhh_gzr_5y">Selecting the Port Used for Synchronisation</a></li></ul></li><li><a href="_m5html5_Synchronising_Unit_Operation_(TDM_Sync).html#topic_title_Examples_d1e18">Examples</a><ul><li><a href="_m5html5_Synchronising_Unit_Operation_(TDM_Sync).html#task_pgn_4yt_flb">Using the Clock of 1 Unit to Synchronise Other Units</a></li><li><a href="_m5html5_Synchronising_Unit_Operation_(TDM_Sync).html#task_lqs_ch5_flb">Using the Clock Provided by the PBX to Synchronise Units</a></li><li><a href="_m5html5_Synchronising_Unit_Operation_(TDM_Sync).html#unique_16588797221599571503">Using an External Clock Source To Synchronise Units</a></li></ul></li><li><a href="_m5html5_Synchronising_Unit_Operation_(TDM_Sync).html#topic_title_Troubleshooting_d1e22">Troubleshooting</a><ul><li><a href="_m5html5_Synchronising_Unit_Operation_(TDM_Sync).html#task_mx4_m2d_hlb">Checking in DGW which Clock Source is Used</a></li><li><a href="_m5html5_Synchronising_Unit_Operation_(TDM_Sync).html#task_tpr_cgd_hlb">Checking in the Traces which Clock Source is Used</a></li></ul></li><li><a href="_m5html5_Synchronising_Unit_Operation_(TDM_Sync).html#reference_j4g_nbv_gfb">Online Help</a></li><li><a href="_m5html5_Synchronising_Unit_Operation_(TDM_Sync).html#concept_v4k_q3h_1r">DGW Documentation</a></li><li><a href="_m5html5_Synchronising_Unit_Operation_(TDM_Sync).html#concept_fqm_rv4_k4">Copyright Notice</a></li></ul></nav><main role="main"><article role="article" aria-labelledby="ariaid-title1"><hr><span style="float: inline-end;"><a href="#">Top</a></span><article class="nested0" aria-labelledby="ariaid-title1" id="concept_es4_nlr_5y">
<h1 class="title topictitle1" id="ariaid-title1">TDM Sync Feature</h1>
<div class="body conbody"><p class="shortdesc">The TDM Sync feature provides a means to synchronise the operation of T1/E1/BRI circuits
spanning across multiple units and to specify which port of a unit should be used as the
reference.</p>
<p class="p">All ISDN ports must be synchronised. When using one device, it is possible to specify a
"source" port for the clock on which the other ports can be synchronised on. With several
devices, the ports of the different units can also be synchronised. Therefore, it is very helpful
to have a special TDM Sync port, with the clock, which can be shared between the devices.</p>
<div class="p">Bad synchronisation can cause, for example:<ul class="ul" id="concept_es4_nlr_5y__ul_pfs_kmr_5y">
<li class="li">Choppy video communications</li>
<li class="li">Failure of fax transmissions</li>
<li class="li">Lost of audio frames</li>
</ul></div>
<p class="p">The Sync signal transferred between units is an 8 KHz Frame Sync Pulse.</p>
</div>
<hr><span style="float: inline-end;"><a href="#">Top</a></span><article class="topic task nested1" aria-labelledby="ariaid-title2" id="task_n32_xxr_5y">
<h2 class="title topictitle2" id="ariaid-title2">Cabling Several Units for TDM Synchronisation</h2>
<div class="body taskbody">
<section class="section context"><div class="tasklabel"><strong class="sectiontitle tasklabel">Context</strong></div>Cabling is done using straight cables in a daisy chain. </section>
<section class="section prereq"><div class="tasklabel"><strong class="sectiontitle tasklabel">Before you begin</strong></div>The common practice is to have the first unit act as the Clock Master.</section>
<section id="task_n32_xxr_5y__steps_jrh_dyr_5y"><div class="tasklabel"><strong class="sectiontitle tasklabel">Steps</strong></div><ol class="ol steps" id="task_n32_xxr_5y__steps_jrh_dyr_5y"><li class="li step">
<span class="ph cmd">Connect a standard Ethernet cable to the <span class="keyword wintitle">SYNC OUT</span> port of the first
device.</span>
</li><li class="li step">
<span class="ph cmd">Connect the other end of the Ethernet cable to the <span class="keyword wintitle">SYNC IN</span> port of
another device.</span>
</li><li class="li step">
<span class="ph cmd">Connect all your units in the same fashion.</span>
</li></ol></section>
<section class="section result"><div class="tasklabel"><strong class="sectiontitle tasklabel">Result</strong></div>
<br><img class="image" id="task_n32_xxr_5y__image_pyg_wdz_5y" src="https://documentation.media5corp.com/download/attachments/45482024/SynchIN-OUT.png" width="300"><br>
</section>
</div>
<nav role="navigation" class="related-links"><div class="linklist relinfo reltasks"><div class="linklistlabel"><strong class="sectiontitle linklistlabel">Next Step</strong></div><ul class="linklist"><li class="linklist"><a class="link" href="_m5html5_Synchronising_Unit_Operation_(TDM_Sync).html#task_bhh_gzr_5y">Selecting the Port Used for Synchronisation</a></li></ul></div></nav></article><hr><span style="float: inline-end;"><a href="#">Top</a></span><article class="topic task nested1" aria-labelledby="ariaid-title3" id="task_bhh_gzr_5y">
<h2 class="title topictitle2" id="ariaid-title3">Selecting the Port Used for Synchronisation</h2>
<div class="body taskbody">
<section id="task_bhh_gzr_5y__steps_u31_ycs_5y"><div class="tasklabel"><strong class="sectiontitle tasklabel">Steps</strong></div><ol class="ol steps" id="task_bhh_gzr_5y__steps_u31_ycs_5y"><li class="li step">
<span class="ph cmd">Access the DGW Web interface of your unit.</span>
</li><li class="li step">
<span class="ph cmd">Go to <span class="keyword wintitle">System</span>/<span class="keyword wintitle">Hardware</span>.</span>
</li><li class="li step">
<span class="ph cmd">In the <span class="keyword wintitle">Clock Reference
Configuration</span>
table, from the <span class="keyword wintitle">Suggestion</span> selection list,
choose <span class="keyword wintitle">SYNCIN</span>. </span>
</li></ol></section>
<section class="section result"><div class="tasklabel"><strong class="sectiontitle tasklabel">Result</strong></div>The unit will be synchronised on the <span class="keyword wintitle">SYNC IN</span> port.<br><img class="image" id="task_bhh_gzr_5y__image_bdx_r2s_5y" src="https://documentation.media5corp.com/download/attachments/45482024/ClockReferenceConfiguration.png" width="800"><br></section>
</div>
</article></article><hr><span style="float: inline-end;"><a href="#">Top</a></span><article class="topic nested0 nobody" aria-labelledby="ariaid-title4" id="topic_title_Examples_d1e18">
<h1 class="title topictitle1" id="ariaid-title4">Examples</h1>
<article class="topic task nested1" aria-labelledby="ariaid-title5" id="task_pgn_4yt_flb">
<h2 class="title topictitle2" id="ariaid-title5">Using the Clock of 1 Unit to Synchronise Other Units</h2>
<div class="body taskbody">
<section class="section context"><div class="tasklabel"><strong class="sectiontitle tasklabel">Context</strong></div>
<p class="p">In this example, four Mediatrix G7 are used. Unit A will share its clock with the
other three G7 units (B,C, and D)</p>
</section>
<section id="task_pgn_4yt_flb__steps_kk3_wyt_flb"><div class="tasklabel"><strong class="sectiontitle tasklabel">Steps</strong></div><ol class="ol steps" id="task_pgn_4yt_flb__steps_kk3_wyt_flb"><li class="li step">
<span class="ph cmd">For all units, go to <span class="keyword wintitle">ISDN</span>/<span class="keyword wintitle">Primary Rate Interface</span>.</span>
</li><li class="li step">
<span class="ph cmd">From the <span class="keyword wintitle">Endpoint Type</span>
selection, choose <span class="keyword wintitle">NT</span>.</span>
</li><li class="li step">
<span class="ph cmd">From the <span class="keyword wintitle">Clock Mode</span>
selection list, choose <span class="keyword wintitle">Auto</span>.</span>
</li><li class="li step">
<span class="ph cmd">For each unit, go to <span class="keyword wintitle">System</span>/<span class="keyword wintitle">Hardware</span>.</span>
</li><li class="li step">
<span class="ph cmd">In the <span class="keyword wintitle">Clock Reference
Configuration</span>
table, from the <span class="keyword wintitle">Suggestion</span> selection list,
choose <span class="keyword wintitle">SYNCIN</span> or
leave it empty. </span>
</li><li class="li step">
<span class="ph cmd">Connect the units as follows: </span>
<ol type="a" class="ol substeps" id="task_pgn_4yt_flb__substeps_os4_4d5_flb">
<li class="li substep">
<span class="ph cmd">No cable in <span class="keyword wintitle">SYNCIN</span> of unit
A.</span>
</li>
<li class="li substep">
<span class="ph cmd"><span class="keyword wintitle">SYNC OUT</span> of
unit A to <span class="keyword wintitle">SYNCIN</span> of unit
B.</span>
</li>
<li class="li substep">
<span class="ph cmd"><span class="keyword wintitle">SYNC OUT</span> of
unit B to <span class="keyword wintitle">SYNCIN</span> of unit
C.</span>
</li>
<li class="li substep">
<span class="ph cmd"><span class="keyword wintitle">SYNC OUT</span> of
unit C to <span class="keyword wintitle">SYNCIN</span> of unit
D.</span>
</li>
</ol>
</li></ol></section>
<section class="section result"><div class="tasklabel"><strong class="sectiontitle tasklabel">Result</strong></div>
<br><img class="image" id="task_pgn_4yt_flb__image_jt3_j25_flb" src="https://documentation.media5corp.com/download/attachments/45482024/SynchIN-OUTunitAtoD.png" width="300"><br>
</section>
</div>
</article><hr><span style="float: inline-end;"><a href="#">Top</a></span><article class="topic task nested1" aria-labelledby="ariaid-title6" id="task_lqs_ch5_flb">
<h2 class="title topictitle2" id="ariaid-title6">Using the Clock Provided by the PBX to Synchronise Units</h2>
<div class="body taskbody">
<section id="task_lqs_ch5_flb__steps_rld_ph5_flb"><div class="tasklabel"><strong class="sectiontitle tasklabel">Steps</strong></div><ol class="ol steps" id="task_lqs_ch5_flb__steps_rld_ph5_flb"><li class="li step">
<span class="ph cmd">For all units, go to <span class="keyword wintitle">ISDN</span>/<span class="keyword wintitle">Primary Rate Interface</span>.</span>
</li><li class="li step">
<span class="ph cmd">From the <span class="keyword wintitle">Endpoint Type</span>
selection, choose <span class="keyword wintitle">TE</span>.</span>
</li><li class="li step">
<span class="ph cmd">From the <span class="keyword wintitle">Clock Mode</span>
selection list, choose <span class="keyword wintitle">Auto</span>.</span>
</li><li class="li step">
<span class="ph cmd">No cabling is required.</span>
</li></ol></section>
<section class="section result"><div class="tasklabel"><strong class="sectiontitle tasklabel">Result</strong></div>No cabling is required between units. All units will be slaves and will get the
clock from the ISDN PBX.</section>
</div>
</article><hr><span style="float: inline-end;"><a href="#">Top</a></span><article class="topic task nested1" aria-labelledby="ariaid-title7" id="unique_16588797221599571503">
<h2 class="title topictitle2" id="ariaid-title7">Using an External Clock Source To Synchronise Units</h2>
<div class="body taskbody">
<section class="section context"><div class="tasklabel"><strong class="sectiontitle tasklabel">Context</strong></div>
<p class="p">In this example, three Mediatrix G7 are connected to use the clock provided from the
PRI ISDN port of Unit A.</p>
</section>
<section id="unique_16588797221599571503__steps_kk3_wyt_flb"><div class="tasklabel"><strong class="sectiontitle tasklabel">Steps</strong></div><ol class="ol steps" id="unique_16588797221599571503__steps_kk3_wyt_flb"><li class="li step">
<span class="ph cmd">For Unit A only, go to <span class="keyword wintitle">ISDN</span>/<span class="keyword wintitle">Primary Rate Interface</span>.</span>
</li><li class="li step">
<span class="ph cmd">From the <span class="keyword wintitle">Endpoint Type</span>
selection, choose <span class="keyword wintitle">TE</span>.</span>
</li><li class="li step">
<span class="ph cmd">From the <span class="keyword wintitle">Clock Mode</span>
selection list, choose <span class="keyword wintitle">Auto</span>.</span>
</li><li class="li step">
<span class="ph cmd">For all other units, go to <span class="keyword wintitle">ISDN</span>/<span class="keyword wintitle">Primary Rate Interface</span>.</span>
</li><li class="li step">
<span class="ph cmd">From the <span class="keyword wintitle">Endpoint Type</span>
selection, choose <span class="keyword wintitle">NT</span>.</span>
</li><li class="li step">
<span class="ph cmd">From the <span class="keyword wintitle">Clock Mode</span>
selection list, choose <span class="keyword wintitle">Auto</span>.</span>
</li><li class="li step">
<span class="ph cmd">For each unit, go to <span class="keyword wintitle">System</span>/<span class="keyword wintitle">Hardware</span>.</span>
</li><li class="li step">
<span class="ph cmd">For unit A only, in the <span class="keyword wintitle">Clock Reference
Configuration</span>
table, from the <span class="keyword wintitle">Suggestion</span> selection list,
choose the Interface receiving the external clock source. </span>
</li><li class="li step">
<span class="ph cmd">For all other units, in the <span class="keyword wintitle">Clock Reference
Configuration</span>
table, from the <span class="keyword wintitle">Suggestion</span> selection list,
choose <span class="keyword wintitle">SYNCIN</span>. </span>
</li><li class="li step">
<span class="ph cmd">Connect the units as follows: </span>
<ol type="a" class="ol substeps" id="unique_16588797221599571503__substeps_os4_4d5_flb">
<li class="li substep">
<span class="ph cmd">No cable in <span class="keyword wintitle">SYNCIN</span> of unit
A.</span>
</li>
<li class="li substep">
<span class="ph cmd"><span class="keyword wintitle">SYNC OUT</span> of
unit A to <span class="keyword wintitle">SYNCIN</span> of unit
B</span>
</li>
<li class="li substep">
<span class="ph cmd"><span class="keyword wintitle">SYNC OUT</span> of
unit B to <span class="keyword wintitle">SYNCIN</span> of unit
C</span>
</li>
<li class="li substep">
<span class="ph cmd"><span class="keyword wintitle">SYNC OUT</span> of
unit C to <span class="keyword wintitle">SYNCIN</span> of unit
D</span>
</li>
</ol>
</li></ol></section>
<section class="section result"><div class="tasklabel"><strong class="sectiontitle tasklabel">Result</strong></div>
<br><img class="image" id="unique_16588797221599571503__image_jt3_j25_flb" src="https://documentation.media5corp.com/download/attachments/45482024/SynchIN-OUTunitAtoD.png" width="300"><br>
</section>
</div>
</article></article><hr><span style="float: inline-end;"><a href="#">Top</a></span><article class="topic nested0 nobody" aria-labelledby="ariaid-title8" id="topic_title_Troubleshooting_d1e22">
<h1 class="title topictitle1" id="ariaid-title8">Troubleshooting</h1>
<article class="topic task nested1" aria-labelledby="ariaid-title9" id="task_mx4_m2d_hlb">
<h2 class="title topictitle2" id="ariaid-title9">Checking in DGW which Clock Source is Used</h2>
<div class="body taskbody">
<section id="task_mx4_m2d_hlb__steps_atc_s2d_hlb"><div class="tasklabel"><strong class="sectiontitle tasklabel">Steps</strong></div><ol class="ol steps" id="task_mx4_m2d_hlb__steps_atc_s2d_hlb"><li class="li step">
<span class="ph cmd">Go to <span class="keyword wintitle">System</span>/<span class="keyword wintitle">Hardware</span>.</span>
</li><li class="li step">
<span class="ph cmd">In the <span class="keyword wintitle">Clock Reference Status</span> table,
the value of the <span class="keyword wintitle">Status</span> field indicates the source of the active source clock.</span>
</li></ol></section>
<section class="section result"><div class="tasklabel"><strong class="sectiontitle tasklabel">Result</strong></div>
<br><img class="image" id="task_mx4_m2d_hlb__image_wmh_vfd_hlb" src="https://documentation.media5corp.com/download/attachments/45482024/ClockReferenceStatus.png" width="800"><br>
</section>
</div>
</article><hr><span style="float: inline-end;"><a href="#">Top</a></span><article class="topic task nested1" aria-labelledby="ariaid-title10" id="task_tpr_cgd_hlb">
<h2 class="title topictitle2" id="ariaid-title10">Checking in the Traces which Clock Source is Used</h2>
<div class="body taskbody">
<section id="task_tpr_cgd_hlb__steps_mz1_jgd_hlb"><div class="tasklabel"><strong class="sectiontitle tasklabel">Steps</strong></div><ol class="ol steps" id="task_tpr_cgd_hlb__steps_mz1_jgd_hlb"><li class="li step">
<span class="ph cmd">Go to <span class="keyword wintitle">System</span>/<span class="keyword wintitle">Diagnostic</span>.</span>
</li><li class="li step">
<span class="ph cmd">Click <span class="keyword wintitle">Dump Now</span>.</span>
</li><li class="li step">
<span class="ph cmd">Go to <span class="keyword wintitle">Management</span>/<span class="keyword wintitle">File</span>.</span>
</li><li class="li step">
<span class="ph cmd">Check for a file with an *.tgz extension.</span>
</li><li class="li step">
<span class="ph cmd">Click the file name and download it locally.</span>
</li><li class="li step">
<span class="ph cmd">Extract the ZIP file and open the dmesg.txt file.</span>
</li><li class="li step">
<span class="ph cmd">Find the last entry of <span class="keyword wintitle">clockref</span>. </span>
</li></ol></section>
<section class="section result"><div class="tasklabel"><strong class="sectiontitle tasklabel">Result</strong></div>The last entry indicates the current clock reference. For example:
<pre class="pre codeblock"><code>clockref: Now using port ext as clock reference.</code></pre></section>
</div>
</article></article><hr><span style="float: inline-end;"><a href="#">Top</a></span><article class="topic reference nested0" aria-labelledby="ariaid-title11" id="reference_j4g_nbv_gfb">
<h1 class="title topictitle1" id="ariaid-title11">Online Help</h1>
<p class="shortdesc"><span class="ph">If you are not familiar with the meaning of the fields and
buttons, click <span class="keyword wintitle">Show Help</span>, located at the upper right corner of
the Web page. When activated, the fields and buttons that offer online help will
change to green and if you hover over them, the description will bedisplayed.</span></p>
</article><hr><span style="float: inline-end;"><a href="#">Top</a></span><article class="topic concept nested0" aria-labelledby="ariaid-title12" id="concept_v4k_q3h_1r">
<h1 class="title topictitle1" id="ariaid-title12">DGW Documentation</h1>
<div class="body conbody"><p class="shortdesc">Mediatrix devices are supplied with an exhaustive set of documentation. </p>
<p class="p">Mediatrix user documentation is available on the <a class="xref" href="http://documentation.media5corp.com" target="_blank">Media5 Documentation
Portal</a>.</p>
<div class="p">Several types of documents were created to clearly present the information you are looking for.
Our documentation includes:<ul class="ul" id="concept_v4k_q3h_1r__ul_bqy_cjh_1r">
<li class="li"><strong class="ph b">Release notes</strong>: Generated at each GA release, this document includes the known and
solved issues of the software. It also outlines the changes and the new features the release
includes.</li>
<li class="li"><strong class="ph b">Configuration notes</strong>: These documents are created to facilitate the configuration of a
specific use case. They address a configuration aspect we consider that most users will need to
perform. However, in some cases, a configuration note is created after receiving a question
from a customer. They provide standard step-by-step procedures detailing the values of the
parameters to use. They provide a means of validation and present some conceptual information.
The configuration notes are specifically created to guide the user through an aspect of the
configuration. </li>
<li class="li"><strong class="ph b">Technical bulletins</strong>: These documents are created to facilitate the configuration of a
specific technical action, such as performing a firmware upgrade.</li>
<li class="li"><strong class="ph b">Hardware installation guide</strong>: They provide the detailed procedure on how to safely and
adequately install the unit. It provides information on card installation, cable connections,
and how to access for the first time the Management interface.</li>
<li class="li"><strong class="ph b">User guide</strong>: The user guide explains how to customise to your needs the configuration
of the unit. Although this document is task oriented, it provides conceptual information to
help the user understand the purpose and impact of each task. The User Guide will provide
information such as where and how TR-069 can be configured in the Management Interface, how to
set firewalls, or how to use the CLI to configure parameters that are not available in the
Management Interface.</li>
<li class="li"><strong class="ph b">Reference guide</strong>: This exhaustive document has been created for advanced users. It
includes a description of all the parameters used by all the services of the Mediatrix units.
You will find, for example, scripts to configure a specific parameter, notification messages
sent by a service, or an action description used to create Rulesets. This document includes
reference information such as a dictionary, and it does not include any step-by-step
procedures. </li>
</ul></div>
</div>
</article><hr><span style="float: inline-end;"><a href="#">Top</a></span><article class="topic concept nested0" aria-labelledby="ariaid-title13" id="concept_fqm_rv4_k4">
<h1 class="title topictitle1" id="ariaid-title13">Copyright Notice</h1>
<div class="body conbody"><p class="shortdesc">Copyright © 2023 Media5 Corporation.</p>
<p class="p">This document contains information that is proprietary to Media5 Corporation.</p>
<p class="p">Media5 Corporation reserves all rights to this document as well as to the Intellectual Property
of the document and the technology and know-how that it includes and represents.</p>
<p class="p">This publication cannot be reproduced, neither in whole nor in part, in any form whatsoever,
without written prior approval by Media5 Corporation.</p>
<p class="p">Media5 Corporation reserves the right to revise this publication and make changes at any time
and without the obligation to notify any person and/or entity of such revisions and/or
changes.</p>
</div>
</article></article></main></body></html> |
