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Do you have any way, on the same physical LAN as the RTCM, to put a third device<br>to monitor packets and use tcpdump/wireshark (depending on your religion.. or ahh choice<br>of OS's) to see if there is something weird going on? This can easily be accomplished with<br>the use of an old-fashioned 10base-T hub (not a switch, a HUB).<br><br>Jim<br><br><div><div id="SkyDrivePlaceholder"></div><hr id="stopSpelling">From: adamson_alan@hotmail.com<br>To: App_rpt-users@ohnosec.org<br>Date: Mon, 11 Jun 2012 15:06:19 -0400<br>Subject: [App_rpt-users] RTCM question(s)<br><br>
<title>RTCM question(s)</title>
<p dir="LTR"><span lang="en-us"><font face="Calibri">I occasionally get a connection lost/connect established almost back to back on my RTCM at a remote site. This is on a hardwired IP connection (finally) with pretty low latency</font></span><span lang="en-us"><font face="Calibri"> and no significant packet loss in the audio on either side.</font></span><span lang="en-us"></span></p>
<p dir="LTR"><span lang="en-us"></span></p>
<p dir="LTR"><span lang="en-us"><font face="Calibri">e.g. here is my response rate from a remote ping to my RTCM</font></span></p>
<p dir="LTR"><span lang="en-us"><font face="Calibri">Pinging</font></span><span lang="en-us"> <font face="Calibri"><host ipaddress></font></span><span lang="en-us"><font face="Calibri"> [64.16</font></span><span lang="en-us"><font face="Calibri">….</font></span><span lang="en-us"><font face="Calibri">] with 32 bytes of data:</font></span></p>
<p dir="LTR"><span lang="en-us"><font face="Calibri">Reply from 64.16</font></span><span lang="en-us"><font face="Calibri">….</font></span><span lang="en-us"><font face="Calibri">: bytes=32 time=60ms TTL=52</font></span></p>
<p dir="LTR"><span lang="en-us"><font face="Calibri">Reply from 64.16</font></span><span lang="en-us"><font face="Calibri">….</font></span><span lang="en-us"><font face="Calibri">: bytes=32 time=58ms TTL=52</font></span></p>
<p dir="LTR"><span lang="en-us"><font face="Calibri">Reply from 64.16</font></span><span lang="en-us"><font face="Calibri">….</font></span><span lang="en-us"><font face="Calibri">: bytes=32 time=103ms TTL=52</font></span></p>
<p dir="LTR"><span lang="en-us"><font face="Calibri">Reply from 64.16</font></span><span lang="en-us"><font face="Calibri">….</font></span><span lang="en-us"><font face="Calibri">: bytes=32 time=99ms TTL=52</font></span></p>
<p dir="LTR"><span lang="en-us"><font face="Calibri">Reply from 64.16</font></span><span lang="en-us"><font face="Calibri">….</font></span><span lang="en-us"><font face="Calibri">: bytes=32 time=81ms TTL=52</font></span></p>
<p dir="LTR"><span lang="en-us"><font face="Calibri">Reply from 64.16</font></span><span lang="en-us"><font face="Calibri">….</font></span><span lang="en-us"><font face="Calibri">: bytes=32 time=74ms TTL=52</font></span></p>
<p dir="LTR"><span lang="en-us"><font face="Calibri">Reply from 64.16</font></span><span lang="en-us"><font face="Calibri">….</font></span><span lang="en-us"><font face="Calibri">: bytes=32 time=96ms TTL=52</font></span></p>
<p dir="LTR"><span lang="en-us"><font face="Calibri">Reply from 64.16</font></span><span lang="en-us"><font face="Calibri">….</font></span><span lang="en-us"><font face="Calibri">: bytes=32 time=64ms TTL=52</font></span></p>
<p dir="LTR"><span lang="en-us"><font face="Calibri">Reply from 64.16</font></span><span lang="en-us"><font face="Calibri">….</font></span><span lang="en-us"><font face="Calibri">: bytes=32 time=57ms TTL=52</font></span></p>
<p dir="LTR"><span lang="en-us"><font face="Calibri">Reply from 64.16</font></span><span lang="en-us"><font face="Calibri">….</font></span><span lang="en-us"><font face="Calibri">: bytes=32 time=65ms TTL=52</font></span></p>
<p dir="LTR"><span lang="en-us"><font face="Calibri">Reply from 64.16</font></span><span lang="en-us"><font face="Calibri">….</font></span><span lang="en-us"><font face="Calibri">: bytes=32 time=63ms TTL=52</font></span></p>
<p dir="LTR"><span lang="en-us"><font face="Calibri">Reply from 64.16</font></span><span lang="en-us"><font face="Calibri">….</font></span><span lang="en-us"><font face="Calibri">: bytes=32 time=150ms TTL=52</font></span></p>
<p dir="LTR"><span lang="en-us"><font face="Calibri">.</font></span></p>
<p dir="LTR"><span lang="en-us"><font face="Calibri">.</font></span></p>
<p dir="LTR"><span lang="en-us"><font face="Calibri">.</font></span><span lang="en-us"></span></p>
<p dir="LTR"><span lang="en-us"><font face="Calibri">Ping statistics for 64.16</font></span><span lang="en-us"><font face="Calibri">….</font></span><span lang="en-us"><font face="Calibri">:</font></span></p>
<p dir="LTR"><span lang="en-us"><font face="Calibri"> Packets: Sent = 37, Received = 37, Lost = 0 (0% loss),</font></span></p>
<p dir="LTR"><span lang="en-us"><font face="Calibri">Approximate round trip times in milli-seconds:</font></span></p>
<p dir="LTR"><span lang="en-us"><font face="Calibri"> Minimum = 57ms, Maximum = 150ms, Average = 87ms</font></span></p>
<p dir="LTR"><span lang="en-us"></span></p>
<p dir="LTR"><span lang="en-us"><font face="Calibri">2 questions. Is there some way to set a time display on the messages on an RTCM</font></span><span lang="en-us"> <font face="Calibri">when it</font></span><span lang="en-us"> <font face="Calibri"> isn't connected to a GPS, I can't tell how long the</font></span><span lang="en-us"> <font face="Calibri">duration</font></span><span lang="en-us"><font face="Calibri"> is between the back to back messages because all I get is as follows.</font></span><span lang="en-us"><font face="Calibri"> </font></span><span lang="en-us"> </span></p>
<p dir="LTR"><span lang="en-us"></span></p>
<p dir="LTR"><span lang="en-us"><font face="Calibri"><System Time Not Set> ERROR! Host response timeout</font></span></p>
<p dir="LTR"><span lang="en-us"><font face="Calibri"><System Time Not Set> Host Connection Lost (Pri) (24.99.5</font></span><span lang="en-us"><font face="Calibri">x</font></span><span lang="en-us"><font face="Calibri">.</font></span><span lang="en-us"><font face="Calibri">xxx</font></span><span lang="en-us"><font face="Calibri">)</font></span></p>
<p dir="LTR"><span lang="en-us"><font face="Calibri"><System Time Not Set> Using Primary Voter Host (24.99.5</font></span><span lang="en-us"><font face="Calibri">x</font></span><span lang="en-us"><font face="Calibri">.</font></span><span lang="en-us"><font face="Calibri">xxx</font></span><span lang="en-us"><font face="Calibri">)</font></span></p>
<p dir="LTR"><span lang="en-us"><font face="Calibri"><System Time Not Set> Host Connection established (Pri) (24.99.5</font></span><span lang="en-us"><font face="Calibri">x</font></span><span lang="en-us"><font face="Calibri">.</font></span><span lang="en-us"><font face="Calibri">xxx</font></span><span lang="en-us"><font face="Calibri">)</font></span><span lang="en-us"></span></p>
<p dir="LTR"><span lang="en-us"><font face="Calibri">This is a single RTCM running in simple radio interface mode.</font></span><span lang="en-us"></span></p>
<p dir="LTR"><span lang="en-us"><font face="Calibri">Can you run an RTCM in simple mode and still connect it to a GPS? W</font></span><span lang="en-us"><font face="Calibri">ill that set it's time locally</font></span><span lang="en-us"><font face="Calibri">?</font></span><span lang="en-us"></span></p>
<p dir="LTR"><span lang="en-us"><font face="Calibri">Is there any way to</font></span><span lang="en-us"><font face="Calibri"> set</font></span><span lang="en-us"> <font face="Calibri">a parameter to lengthen the timeout timer in either the voter.conf file or the RTCM configuration</font></span><span lang="en-us"><font face="Calibri">? I'm sure we are</font></span><span lang="en-us"><font face="Calibri"> only</font></span><span lang="en-us"><font face="Calibri"> talking about a few milliseconds difference is all that's needed.</font></span><span lang="en-us"></span></p>
<p dir="LTR"><span lang="en-us"></span></p>
<p dir="LTR"><span lang="en-us"><font face="Calibri">Thanks in advance,</font></span></p>
<p dir="LTR"><span lang="en-us"><font face="Calibri">Alan</font></span><span lang="en-us"></span></p>
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