diff --git a/doc/guides/sample_app_ug/img/ptpclient.svg b/doc/guides/sample_app_ug/img/ptpclient.svg
new file mode 100644
index 0000000..55c134e
--- /dev/null
+++ b/doc/guides/sample_app_ug/img/ptpclient.svg
@@ -0,0 +1,520 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!-- Created with Inkscape (http://www.inkscape.org/) -->
+
+<svg
+   xmlns:dc="http://purl.org/dc/elements/1.1/"
+   xmlns:cc="http://creativecommons.org/ns#"
+   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+   xmlns:svg="http://www.w3.org/2000/svg"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   width="105mm"
+   height="148mm"
+   viewBox="0 0 372.04724 524.40945"
+   id="svg2"
+   version="1.1"
+   inkscape:version="0.91 r13725"
+   sodipodi:docname="drawing3.svg">
+  <defs
+     id="defs4">
+    <marker
+       inkscape:stockid="Arrow2Mend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="Arrow2Mend"
+       style="overflow:visible"
+       inkscape:isstock="true">
+      <path
+         id="path4256"
+         style="fill:#000000;fill-opacity:1;fill-rule:evenodd;stroke:#000000;stroke-width:0.625;stroke-linejoin:round;stroke-opacity:1"
+         d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+         transform="scale(-0.6,-0.6)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <marker
+       inkscape:stockid="Arrow2Lstart"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="Arrow2Lstart"
+       style="overflow:visible"
+       inkscape:isstock="true">
+      <path
+         id="path4247"
+         style="fill:#000000;fill-opacity:1;fill-rule:evenodd;stroke:#000000;stroke-width:0.625;stroke-linejoin:round;stroke-opacity:1"
+         d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+         transform="matrix(1.1,0,0,1.1,1.1,0)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <marker
+       inkscape:isstock="true"
+       style="overflow:visible"
+       id="marker6746"
+       refX="0"
+       refY="0"
+       orient="auto"
+       inkscape:stockid="Arrow2Lend">
+      <path
+         transform="matrix(-1.1,0,0,-1.1,-1.1,0)"
+         d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+         style="fill:#ff00ff;fill-opacity:1;fill-rule:evenodd;stroke:#000000;stroke-width:0.625;stroke-linejoin:round;stroke-opacity:1"
+         id="path6748"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <marker
+       inkscape:stockid="Arrow2Lend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="marker6526"
+       style="overflow:visible"
+       inkscape:isstock="true"
+       inkscape:collect="always">
+      <path
+         id="path6528"
+         style="fill:#ff00ff;fill-opacity:1;fill-rule:evenodd;stroke:#000000;stroke-width:0.625;stroke-linejoin:round;stroke-opacity:1"
+         d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+         transform="matrix(-1.1,0,0,-1.1,-1.1,0)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <marker
+       inkscape:stockid="Arrow1Lend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="marker6276"
+       style="overflow:visible"
+       inkscape:isstock="true">
+      <path
+         id="path6278"
+         d="M 0,0 5,-5 -12.5,0 5,5 0,0 Z"
+         style="fill:#ff00ff;fill-opacity:1;fill-rule:evenodd;stroke:#000000;stroke-width:1pt;stroke-opacity:1"
+         transform="matrix(-0.8,0,0,-0.8,-10,0)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <marker
+       inkscape:isstock="true"
+       style="overflow:visible"
+       id="marker6128"
+       refX="0"
+       refY="0"
+       orient="auto"
+       inkscape:stockid="DotM">
+      <path
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)"
+         style="fill:#ff00ff;fill-opacity:1;fill-rule:evenodd;stroke:#000000;stroke-width:1pt;stroke-opacity:1"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         id="path6130"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <marker
+       inkscape:isstock="true"
+       style="overflow:visible"
+       id="marker6022"
+       refX="0"
+       refY="0"
+       orient="auto"
+       inkscape:stockid="Arrow2Lend"
+       inkscape:collect="always">
+      <path
+         transform="matrix(-1.1,0,0,-1.1,-1.1,0)"
+         d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+         style="fill:#ff00ff;fill-opacity:1;fill-rule:evenodd;stroke:#000000;stroke-width:0.625;stroke-linejoin:round;stroke-opacity:1"
+         id="path6024"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <marker
+       inkscape:isstock="true"
+       style="overflow:visible"
+       id="marker5922"
+       refX="0"
+       refY="0"
+       orient="auto"
+       inkscape:stockid="DotM">
+      <path
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)"
+         style="fill:#000000;fill-opacity:1;fill-rule:evenodd;stroke:#000000;stroke-width:1pt;stroke-opacity:1"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         id="path5924"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <marker
+       inkscape:stockid="Arrow2Lend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="Arrow2Lend"
+       style="overflow:visible"
+       inkscape:isstock="true"
+       inkscape:collect="always">
+      <path
+         id="path4250"
+         style="fill:#0000ff;fill-opacity:1;fill-rule:evenodd;stroke:#000000;stroke-width:0.625;stroke-linejoin:round;stroke-opacity:1"
+         d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+         transform="matrix(-1.1,0,0,-1.1,-1.1,0)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="marker5676"
+       style="overflow:visible"
+       inkscape:isstock="true"
+       inkscape:collect="always">
+      <path
+         id="path5678"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill:#0000ff;fill-opacity:1;fill-rule:evenodd;stroke:#000000;stroke-width:1pt;stroke-opacity:1"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <marker
+       inkscape:stockid="Arrow1Lstart"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="marker5600"
+       style="overflow:visible"
+       inkscape:isstock="true">
+      <path
+         id="path5602"
+         d="M 0,0 5,-5 -12.5,0 5,5 0,0 Z"
+         style="fill:#000000;fill-opacity:1;fill-rule:evenodd;stroke:#000000;stroke-width:1pt;stroke-opacity:1"
+         transform="matrix(0.8,0,0,0.8,10,0)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <marker
+       inkscape:isstock="true"
+       style="overflow:visible"
+       id="marker5510"
+       refX="0"
+       refY="0"
+       orient="auto"
+       inkscape:stockid="DotM"
+       inkscape:collect="always">
+      <path
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)"
+         style="fill:#ff00ff;fill-opacity:1;fill-rule:evenodd;stroke:#000000;stroke-width:1pt;stroke-opacity:1"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         id="path5512"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <marker
+       inkscape:stockid="Arrow1Lend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="marker4651"
+       style="overflow:visible"
+       inkscape:isstock="true">
+      <path
+         id="path4653"
+         d="M 0,0 5,-5 -12.5,0 5,5 0,0 Z"
+         style="fill:#000000;fill-opacity:1;fill-rule:evenodd;stroke:#000000;stroke-width:1pt;stroke-opacity:1"
+         transform="matrix(-0.8,0,0,-0.8,-10,0)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <marker
+       inkscape:stockid="Arrow1Lend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="marker4605"
+       style="overflow:visible"
+       inkscape:isstock="true">
+      <path
+         id="path4607"
+         d="M 0,0 5,-5 -12.5,0 5,5 0,0 Z"
+         style="fill:#000000;fill-opacity:1;fill-rule:evenodd;stroke:#000000;stroke-width:1pt;stroke-opacity:1"
+         transform="matrix(-0.8,0,0,-0.8,-10,0)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <marker
+       inkscape:stockid="Arrow1Lend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="Arrow1Lend"
+       style="overflow:visible"
+       inkscape:isstock="true">
+      <path
+         id="path4232"
+         d="M 0,0 5,-5 -12.5,0 5,5 0,0 Z"
+         style="fill:#000000;fill-opacity:1;fill-rule:evenodd;stroke:#000000;stroke-width:1pt;stroke-opacity:1"
+         transform="matrix(-0.8,0,0,-0.8,-10,0)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <marker
+       inkscape:stockid="DotM"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="DotM"
+       style="overflow:visible"
+       inkscape:isstock="true"
+       inkscape:collect="always">
+      <path
+         id="path4293"
+         d="m -2.5,-1 c 0,2.76 -2.24,5 -5,5 -2.76,0 -5,-2.24 -5,-5 0,-2.76 2.24,-5 5,-5 2.76,0 5,2.24 5,5 z"
+         style="fill:#ff00ff;fill-opacity:1;fill-rule:evenodd;stroke:#000000;stroke-width:1pt;stroke-opacity:1"
+         transform="matrix(0.4,0,0,0.4,2.96,0.4)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <marker
+       inkscape:stockid="Arrow1Lstart"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="Arrow1Lstart"
+       style="overflow:visible"
+       inkscape:isstock="true">
+      <path
+         id="path4229"
+         d="M 0,0 5,-5 -12.5,0 5,5 0,0 Z"
+         style="fill:#000000;fill-opacity:1;fill-rule:evenodd;stroke:#000000;stroke-width:1pt;stroke-opacity:1"
+         transform="matrix(0.8,0,0,0.8,10,0)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <inkscape:path-effect
+       effect="spiro"
+       id="path-effect3402"
+       is_visible="true" />
+    <inkscape:path-effect
+       effect="spiro"
+       id="path-effect3398"
+       is_visible="true" />
+    <inkscape:path-effect
+       effect="spiro"
+       id="path-effect3394"
+       is_visible="true" />
+    <inkscape:path-effect
+       effect="spiro"
+       id="path-effect3378"
+       is_visible="true" />
+    <inkscape:path-effect
+       effect="spiro"
+       id="path-effect3374"
+       is_visible="true" />
+    <inkscape:path-effect
+       effect="spiro"
+       id="path-effect3370"
+       is_visible="true" />
+    <inkscape:path-effect
+       effect="spiro"
+       id="path-effect3366"
+       is_visible="true" />
+  </defs>
+  <sodipodi:namedview
+     id="base"
+     pagecolor="#ffffff"
+     bordercolor="#666666"
+     borderopacity="1.0"
+     inkscape:pageopacity="0.0"
+     inkscape:pageshadow="2"
+     inkscape:zoom="1.06"
+     inkscape:cx="280.7353"
+     inkscape:cy="266.181"
+     inkscape:document-units="px"
+     inkscape:current-layer="layer1"
+     showgrid="false"
+     showguides="false"
+     inkscape:window-width="1920"
+     inkscape:window-height="1053"
+     inkscape:window-x="1920"
+     inkscape:window-y="103"
+     inkscape:window-maximized="0" />
+  <metadata
+     id="metadata7">
+    <rdf:RDF>
+      <cc:Work
+         rdf:about="">
+        <dc:format>image/svg+xml</dc:format>
+        <dc:type
+           rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
+        <dc:title></dc:title>
+      </cc:Work>
+    </rdf:RDF>
+  </metadata>
+  <g
+     inkscape:label="Layer 1"
+     inkscape:groupmode="layer"
+     id="layer1"
+     transform="translate(0,-527.95276)">
+    <path
+       style="fill:none;fill-rule:evenodd;stroke:#000000;stroke-width:1.44085264;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1"
+       d="m 64.094156,600.99321 c 0,60.57637 0,393.74649 0,393.74649"
+       id="path3388"
+       inkscape:connector-curvature="0" />
+    <path
+       style="fill:none;fill-rule:evenodd;stroke:#000000;stroke-width:1.63210523;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1"
+       d="m 291.64401,600.59617 0,394.60083"
+       id="path3390"
+       inkscape:connector-curvature="0" />
+    <path
+       style="fill:#ff00ff;fill-rule:evenodd;stroke:#000000;stroke-width:1.28789771;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:2;stroke-dasharray:none;stroke-opacity:1;marker-start:url(#DotM);marker-end:url(#marker6746)"
+       d="M 64.094156,623.68474 289.7829,665.38811"
+       id="path4223"
+       inkscape:connector-curvature="0" />
+    <path
+       style="fill:#ff00ff;fill-rule:evenodd;stroke:#000000;stroke-width:1.28789771;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1;marker-start:url(#marker5510);marker-end:url(#marker6526)"
+       d="M 63.199944,683.08006 290.44233,725.29448"
+       id="path5274"
+       inkscape:connector-curvature="0" />
+    <text
+       xml:space="preserve"
+       style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:20.39868927px;line-height:100%;font-family:sans-serif;-inkscape-font-specification:'sans-serif, Normal';text-align:start;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:start;fill:#000080;fill-opacity:1;stroke:none;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
+       x="295.22058"
+       y="665.10974"
+       id="text5424"
+       sodipodi:linespacing="100%"><tspan
+         sodipodi:role="line"
+         id="tspan5426"
+         x="295.22058"
+         y="665.10974">T2</tspan></text>
+    <text
+       xml:space="preserve"
+       style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:20.39868927px;line-height:100%;font-family:sans-serif;-inkscape-font-specification:'sans-serif, Normal';text-align:start;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:start;fill:#800080;fill-opacity:1;stroke:none;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
+       x="242.44649"
+       y="657.08087"
+       id="text5428"
+       sodipodi:linespacing="100%"
+       transform="matrix(0.98289795,0.18415108,-0.18415108,0.98289795,0,0)"><tspan
+         sodipodi:role="line"
+         id="tspan5430"
+         x="242.44649"
+         y="657.08087">FOLLOW UP:T1</tspan></text>
+    <path
+       style="fill:#0000ff;fill-rule:evenodd;stroke:#000000;stroke-width:1.28789771;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1;marker-start:url(#marker5676);marker-end:url(#Arrow2Lend)"
+       d="M 291.5001,774.36878 64.400801,816.4401"
+       id="path5586"
+       inkscape:connector-curvature="0" />
+    <text
+       xml:space="preserve"
+       style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:20.39868927px;line-height:100%;font-family:sans-serif;-inkscape-font-specification:'sans-serif, Normal';text-align:start;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:start;fill:#000080;fill-opacity:1;stroke:none;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
+       x="-44.967201"
+       y="809.64362"
+       id="text5898"
+       sodipodi:linespacing="100%"
+       transform="matrix(0.98291896,-0.18403889,0.18403889,0.98291896,0,0)"><tspan
+         sodipodi:role="line"
+         id="tspan5900"
+         x="-44.967201"
+         y="809.64362">DELAY REQUEST</tspan></text>
+    <text
+       xml:space="preserve"
+       style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:20.39868927px;line-height:100%;font-family:sans-serif;-inkscape-font-specification:'sans-serif, Normal';text-align:start;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:start;fill:#000080;fill-opacity:1;stroke:none;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
+       x="297.08099"
+       y="774.7981"
+       id="text5902"
+       sodipodi:linespacing="100%"><tspan
+         sodipodi:role="line"
+         id="tspan5904"
+         x="297.08099"
+         y="774.7981">T3</tspan></text>
+    <text
+       xml:space="preserve"
+       style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:20.39868927px;line-height:100%;font-family:sans-serif;-inkscape-font-specification:'sans-serif, Normal';text-align:start;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:start;fill:#800080;fill-opacity:1;stroke:none;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
+       x="35.20845"
+       y="817.29871"
+       id="text5906"
+       sodipodi:linespacing="100%"><tspan
+         sodipodi:role="line"
+         id="tspan5908"
+         x="35.20845"
+         y="817.29871">T4</tspan></text>
+    <text
+       xml:space="preserve"
+       style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:20.39868927px;line-height:100%;font-family:sans-serif;-inkscape-font-specification:'sans-serif, Normal';text-align:start;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:start;fill:#800080;fill-opacity:1;stroke:none;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
+       x="33.920555"
+       y="623.68475"
+       id="text5910"
+       sodipodi:linespacing="100%"><tspan
+         sodipodi:role="line"
+         id="tspan5912"
+         x="33.920555"
+         y="623.68475">T1</tspan></text>
+    <path
+       style="fill:#ff00ff;fill-rule:evenodd;stroke:#000000;stroke-width:1.28789771;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1;marker-start:url(#marker6128);marker-end:url(#marker6022)"
+       d="M 63.971502,838.62056 290.6415,881.55049"
+       id="path5914"
+       inkscape:connector-curvature="0" />
+    <text
+       xml:space="preserve"
+       style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:20.39868927px;line-height:100%;font-family:sans-serif;-inkscape-font-specification:'sans-serif, Normal';text-align:start;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:start;fill:#800080;fill-opacity:1;stroke:none;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
+       x="223.59686"
+       y="811.73932"
+       id="text6858"
+       sodipodi:linespacing="100%"
+       transform="matrix(0.98367106,0.17997568,-0.17997568,0.98367106,0,0)"><tspan
+         sodipodi:role="line"
+         id="tspan6860"
+         x="223.59686"
+         y="811.73932">DELAY RESPONSE:T4</tspan></text>
+    <text
+       xml:space="preserve"
+       style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:20.39868927px;line-height:100%;font-family:sans-serif;-inkscape-font-specification:'sans-serif, Normal';text-align:start;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:start;fill:#000000;fill-opacity:1;stroke:none;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
+       x="813.40204"
+       y="-298.41309"
+       id="text6862"
+       sodipodi:linespacing="100%"
+       transform="matrix(0.0147127,0.99989176,-0.99989176,0.0147127,0,0)"><tspan
+         sodipodi:role="line"
+         id="tspan6864"
+         x="813.40204"
+         y="-298.41309">time</tspan></text>
+    <path
+       style="fill:none;fill-rule:evenodd;stroke:#000000;stroke-width:2.1464963;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1;marker-end:url(#Arrow2Mend)"
+       d="m 316.97185,863.23372 0,66.11208"
+       id="path6866"
+       inkscape:connector-curvature="0" />
+    <text
+       xml:space="preserve"
+       style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:13.42257881px;line-height:100%;font-family:sans-serif;-inkscape-font-specification:'sans-serif, Normal';text-align:start;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:start;fill:#800080;fill-opacity:1;stroke:none;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
+       x="38.764343"
+       y="590.47479"
+       id="text7094"
+       sodipodi:linespacing="100%"><tspan
+         sodipodi:role="line"
+         id="tspan7096"
+         x="38.764343"
+         y="590.47479">master</tspan></text>
+    <text
+       xml:space="preserve"
+       style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:47.51625061px;line-height:100%;font-family:sans-serif;-inkscape-font-specification:'sans-serif, Normal';text-align:start;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:start;fill:#000000;fill-opacity:1;stroke:none;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
+       x="571.69812"
+       y="61.796165"
+       id="text7098"
+       sodipodi:linespacing="100%"><tspan
+         sodipodi:role="line"
+         id="tspan7100"
+         x="571.69812"
+         y="61.796165" /></text>
+    <text
+       xml:space="preserve"
+       style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:13.42257881px;line-height:100%;font-family:sans-serif;-inkscape-font-specification:'sans-serif, Normal';text-align:start;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:start;fill:#000080;fill-opacity:1;stroke:none;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
+       x="271.23392"
+       y="593.71478"
+       id="text7102"
+       sodipodi:linespacing="100%"><tspan
+         sodipodi:role="line"
+         id="tspan7104"
+         x="271.23392"
+         y="593.71478">slave</tspan></text>
+    <text
+       xml:space="preserve"
+       style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:20.3917141px;line-height:125%;font-family:sans-serif;-inkscape-font-specification:'sans-serif, Normal';text-align:start;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:start;fill:#800080;fill-opacity:1;stroke:none;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
+       x="244.40062"
+       y="602.10443"
+       id="text4317"
+       sodipodi:linespacing="125%"
+       transform="matrix(0.98605316,0.16643065,-0.16643065,0.98605316,0,0)"><tspan
+         sodipodi:role="line"
+         id="tspan4319"
+         x="244.40062"
+         y="602.10443">SYNC</tspan></text>
+  </g>
+</svg>
diff --git a/doc/guides/sample_app_ug/index.rst b/doc/guides/sample_app_ug/index.rst
index 9beedd9..8ae86c0 100644
--- a/doc/guides/sample_app_ug/index.rst
+++ b/doc/guides/sample_app_ug/index.rst
@@ -73,6 +73,7 @@ Sample Applications User Guide
     vm_power_management
     tep_termination
     proc_info
+    ptpclient
 
 **Figures**
 
@@ -136,6 +137,8 @@ Sample Applications User Guide
 :numref:`figure_overlay_networking` :ref:`figure_overlay_networking`
 :numref:`figure_tep_termination_arch` :ref:`figure_tep_termination_arch`
 
+:numref:`figure_ptpclient_highlevel` :ref:`figure_ptpclient_highlevel`
+
 **Tables**
 
 :numref:`table_qos_metering_1` :ref:`table_qos_metering_1`
diff --git a/doc/guides/sample_app_ug/ptpclient.rst b/doc/guides/sample_app_ug/ptpclient.rst
new file mode 100644
index 0000000..6e425b7
--- /dev/null
+++ b/doc/guides/sample_app_ug/ptpclient.rst
@@ -0,0 +1,306 @@
+..  BSD LICENSE
+    Copyright(c) 2015 Intel Corporation. All rights reserved.
+    All rights reserved.
+
+    Redistribution and use in source and binary forms, with or without
+    modification, are permitted provided that the following conditions
+    are met:
+
+    * Redistributions of source code must retain the above copyright
+    notice, this list of conditions and the following disclaimer.
+    * Redistributions in binary form must reproduce the above copyright
+    notice, this list of conditions and the following disclaimer in
+    the documentation and/or other materials provided with the
+    distribution.
+    * Neither the name of Intel Corporation nor the names of its
+    contributors may be used to endorse or promote products derived
+    from this software without specific prior written permission.
+
+    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+    "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+    LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+    A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+    OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+    SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+    LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+    DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+    THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+    (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+    OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+
+PTP Client Sample Application
+=============================
+
+The PTP (Precision Time Protocol) client sample application is a simple
+example of using the DPDK IEEE1588 API to communicate with a PTP master clock
+to synchronize the time on the NIC and, optionally, on the Linux system.
+
+Note, PTP is a time syncing protocol and cannot be used within DPDK as a
+time-stamping mechanism. See the following for an explanation of the protocol:
+`Precision Time Protocol
+<https://en.wikipedia.org/wiki/Precision_Time_Protocol>`_.
+
+
+Limitations
+-----------
+
+The PTP sample application is intended as a simple reference implementation of
+a PTP client using the DPDK IEEE1588 API.
+In order to keep the application simple the following assumptions are made:
+
+* The first discovered master is the master for the session.
+* Only L2 PTP packets are supported.
+* Only the PTP v2 protocol is supported.
+* Only the slave clock is implemented.
+
+
+How the Application Works
+-------------------------
+
+.. _figure_ptpclient_highlevel:
+
+.. figure:: img/ptpclient.*
+
+   PTP Synchronization Protocol
+
+The PTP synchronization in the sample application works as follows:
+
+* Master sends *Sync* message - the slave saves it as T2.
+* Master sends *Follow Up* message and sends time of T1.
+* Slave sends *Delay Request* frame to PTP Master and stores T3.
+* Master sends *Delay Response* T4 time which is time of received T3.
+
+The adjustment for slave can be represented as:
+
+   adj = -[(T2-T1)-(T4 - T3)]/2
+
+If the command line parameter ``-T 1`` is used the application also
+synchronizes the PTP PHC clock with the Linux kernel clock.
+
+
+Compiling the Application
+-------------------------
+
+To compile the application, export the path to the DPDK source tree and edit
+the ``config/common_linuxapp`` configuration file to enable IEEE1588:
+
+.. code-block:: console
+
+    export RTE_SDK=/path/to/rte_sdk
+
+    # Edit  common_linuxapp and set the following options:
+    CONFIG_RTE_LIBRTE_IEEE1588=y
+
+Set the target, for example:
+
+.. code-block:: console
+
+    export RTE_TARGET=x86_64-native-linuxapp-gcc
+
+See the *DPDK Getting Started* Guide for possible ``RTE_TARGET`` values.
+
+Build the application as follows:
+
+.. code-block:: console
+
+    # Recompile DPDK.
+    make install T=$RTE_TARGET
+
+    # Compile the application.
+    cd ${RTE_SDK}/examples/ptpclient
+    make
+
+
+Running the Application
+-----------------------
+
+To run the example in a ``linuxapp`` environment:
+
+.. code-block:: console
+
+    ./build/ptpclient -c 2 -n 4 -- -p 0x1 -T 0
+
+Refer to *DPDK Getting Started Guide* for general information on running
+applications and the Environment Abstraction Layer (EAL) options.
+
+* ``-p portmask``: Hexadecimal portmask.
+* ``-T 0``: Update only the PTP slave clock.
+* ``-T 1``: Update the PTP slave clock and synchronize the Linux Kernel to the PTP clock.
+
+
+Code Explanation
+----------------
+
+The following sections provide an explanation of the main components of the
+code.
+
+All DPDK library functions used in the sample code are prefixed with ``rte_``
+and are explained in detail in the *DPDK API Documentation*.
+
+
+The Main Function
+~~~~~~~~~~~~~~~~~
+
+The ``main()`` function performs the initialization and calls the execution
+threads for each lcore.
+
+The first task is to initialize the Environment Abstraction Layer (EAL).  The
+``argc`` and ``argv`` arguments are provided to the ``rte_eal_init()``
+function. The value returned is the number of parsed arguments:
+
+.. code-block:: c
+
+    int ret = rte_eal_init(argc, argv);
+    if (ret < 0)
+        rte_exit(EXIT_FAILURE, "Error with EAL initialization\n");
+
+And than we parse application specific arguments
+
+.. code-block:: c
+
+    argc -= ret;
+    argv += ret;
+
+    ret = ptp_parse_args(argc, argv);
+    if (ret < 0)
+        rte_exit(EXIT_FAILURE, "Error with PTP initialization\n");
+
+The ``main()`` also allocates a mempool to hold the mbufs (Message Buffers)
+used by the application:
+
+.. code-block:: c
+
+    mbuf_pool = rte_mempool_create("MBUF_POOL",
+                                   NUM_MBUFS * nb_ports,
+                                   MBUF_SIZE,
+                                   MBUF_CACHE_SIZE,
+                                   sizeof(struct rte_pktmbuf_pool_private),
+                                   rte_pktmbuf_pool_init, NULL,
+                                   rte_pktmbuf_init,      NULL,
+                                   rte_socket_id(),
+                                   0);
+
+Mbufs are the packet buffer structure used by DPDK. They are explained in
+detail in the "Mbuf Library" section of the *DPDK Programmer's Guide*.
+
+The ``main()`` function also initializes all the ports using the user defined
+``port_init()`` function with portmask provided by user:
+
+.. code-block:: c
+
+    for (portid = 0; portid < nb_ports; portid++)
+        if ((ptp_enabled_port_mask & (1 << portid)) != 0) {
+
+            if (port_init(portid, mbuf_pool) == 0) {
+                ptp_enabled_ports[ptp_enabled_port_nb] = portid;
+                ptp_enabled_port_nb++;
+            } else {
+                rte_exit(EXIT_FAILURE, "Cannot init port %"PRIu8 "\n",
+                        portid);
+            }
+        }
+
+
+Once the initialization is complete, the application is ready to launch a
+function on an lcore. In this example ``lcore_main()`` is called on a single
+lcore.
+
+.. code-block:: c
+
+	lcore_main();
+
+The ``lcore_main()`` function is explained below.
+
+
+The Lcores Main
+~~~~~~~~~~~~~~~
+
+As we saw above the ``main()`` function calls an application function on the
+available lcores.
+
+The main work of the application is done within the loop:
+
+.. code-block:: c
+
+        for (portid = 0; portid < ptp_enabled_port_nb; portid++) {
+
+            portid = ptp_enabled_ports[portid];
+            nb_rx = rte_eth_rx_burst(portid, 0, &m, 1);
+
+            if (likely(nb_rx == 0))
+                continue;
+
+            if (m->ol_flags & PKT_RX_IEEE1588_PTP)
+                parse_ptp_frames(portid, m);
+
+            rte_pktmbuf_free(m);
+        }
+
+Packets are received one by one on the RX ports and, if required, PTP response
+packets are transmitted on the TX ports.
+
+If the offload flags in the mbuf indicate that the packet is a PTP packet then
+the packet is parsed to determine which type:
+
+.. code-block:: c
+
+            if (m->ol_flags & PKT_RX_IEEE1588_PTP)
+                 parse_ptp_frames(portid, m);
+
+
+All packets are freed explicitly using ``rte_pktmbuf_free()``.
+
+The forwarding loop can be interrupted and the application closed using
+``Ctrl-C``.
+
+
+PTP parsing
+~~~~~~~~~~~
+
+The ``parse_ptp_frames()`` function processes PTP packets, implementing slave
+PTP IEEE1588 L2 functionality.
+
+.. code-block:: c
+
+    void
+    parse_ptp_frames(uint8_t portid, struct rte_mbuf *m) {
+        struct ptp_header *ptp_hdr;
+        struct ether_hdr *eth_hdr;
+        uint16_t eth_type;
+
+        eth_hdr = rte_pktmbuf_mtod(m, struct ether_hdr *);
+        eth_type = rte_be_to_cpu_16(eth_hdr->ether_type);
+
+        if (eth_type == PTP_PROTOCOL) {
+            ptp_data.m = m;
+            ptp_data.portid = portid;
+            ptp_hdr = (struct ptp_header *)(rte_pktmbuf_mtod(m, char *)
+                        + sizeof(struct ether_hdr));
+
+            switch (ptp_hdr->msgtype) {
+            case SYNC:
+                parse_sync(&ptp_data);
+                break;
+            case FOLLOW_UP:
+                parse_fup(&ptp_data);
+                break;
+            case DELAY_RESP:
+                parse_drsp(&ptp_data);
+                print_clock_info(&ptp_data);
+                break;
+            default:
+                break;
+            }
+        }
+    }
+
+There are 3 types of packets on the RX path which we must parse to create a minimal
+implementation of the PTP slave client:
+
+* SYNC packet.
+* FOLLOW UP packet
+* DELAY RESPONSE packet.
+
+When we parse the *FOLLOW UP* packet we also create and send a *DELAY_REQUEST* packet.
+Also when we parse the *DELAY RESPONSE* packet, and all conditions are met we adjust the PTP slave clock.
