[ntp:questions] Re: CTS, IRIG-B, and a Sun v210

Richard B. Gilbert rgilbert88 at comcast.net
Fri Apr 15 19:50:04 UTC 2005


Stewart Pelegan wrote:

>Ooops.  I meant an RS-422 <-> RS-232 converter.
>
>And the version of ntp that I'm using is the one that comes with Solaris, 
>v3.5x.  Can I get the latest ntpd compiled for Sun?  Thanks.
>
>Stewart Pelegan
>Computer Sciences Corporation
>301.921.3206
>Fax: 301.921.0985
>
>
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>
>
>Stewart Pelegan/CIV/CSC
>@CSC
>Sent by: questions-bounces
>04/15/2005 08:41 AM
> 
>        To:     Harlan Stenn <stenn at ntp.isc.org>
>        cc:     questions at lists.ntp.isc.org
>        Subject:        Re: [ntp:questions] Re: CTS, IRIG-B, and a Sun 
>v210
>
>
>The TrueTime box I'm working with is a Model XL-DC 151-602-492 running 
>TRUETIME MK III software sysver 021.
>
>The tty port on my Sun v210 box is an RS-232 port.  I have a 422-322 
>converter.
>
>I was using a null-modem cable to connect the Sun box and TrueTime box via 
>
>RS-232.  Do I need a null-modem cable for RS-422 communications?
>
>Let me know if you need any more info.  Thanks.
>
>Stewart Pelegan
>Computer Sciences Corporation
>301.921.3206
>Fax: 301.921.0985
>
>
>----------------------------------------------------------------------------------------
>This is a PRIVATE message. If you are not the intended recipient, please 
>delete without copying and kindly advise us by e-mail of the mistake in 
>delivery. NOTE: Regardless of content, this e-mail shall not operate to 
>bind CSC to any order or other contract unless pursuant to explicit 
>written agreement or government initiative expressly permitting the use of 
>
>e-mail for such purpose.
>----------------------------------------------------------------------------------------
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>
>
>
>
>Harlan Stenn <stenn
>@ntp.isc.org>
>Sent by: questions-bounces
>04/14/2005 09:19 PM
> 
>        To:     questions at lists.ntp.isc.org
>        cc: 
>        Subject:        [ntp:questions] Re: CTS, IRIG-B, and a Sun v210
>
>
>Stewart,
>
>  
>
>>I think I've been able to get ntpd and my TrueTime box talking to each 
>>other via rs-232.  Now, I'm trying to get them to talk via the same 
>>TrueTime box's rs-422 port.  I believe the rs-422 port on the TrueTime 
>>    
>>
>box 
>  
>
>>puts out an IRIG-B signal.
>>    
>>
>
>It would help to know exactly what model of TrueTime box you are talking
>about.  My experience is limited, but I am used to seeing IRIG-B delivered
>thru a BNC connector (I'm talking about the audio signal that needs to be
>decoded, you may be talking about a signal that has already been decoded).
>
>  
>
>>With the rs-232 port, I was using:
>>    
>>
>
>  
>
>>       server 127.127.5.0
>>    
>>
>
>  
>
>>in the ntp.conf file.  What do I use for the IRIG rs-422 port?
>>    
>>
>
>If your tty port can handle 422 data, that should be the same.
>
>It would also help to know which version of ntpd you were using.
>
>  
>
>>On the Sun v210, I had a link from /dev/ttyb to /dev/true0.  Do I need a 
>>    
>>
>
>
>  
>
>>different symbolic link? 
>>    
>>
>
>Not sure yet.
>
>And please consider visiting 
>http://ntp.isc.org/Support/ConfiguringRefclocks
>and adding or correcting information.
>
>H
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>  
>
You can download the source 
<http://ntp.isc.org/bin/view/Main/SoftwareDownloads> and build it 
yourself or download a pre built version 
<http://www.sunfreeware.com/>.   Building your own gives you full 
control but requires a C compiler, make, etc, etc.   You can download 
gcc, gmake, etc, etc, if you need the tools to build the package.



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