[TheList] TheList Digest, Vol 15, Issue 14

Fri Jul 23 12:39:47 AEST 2010

thanks for posting, very informative, this is what the list is all about.

--- On Fri, 23/7/10, duckyduck at inet.net.nz <duckyduck at inet.net.nz> wrote:

From: duckyduck at inet.net.nz <duckyduck at inet.net.nz>
Subject: Re: [TheList] TheList Digest, Vol 15, Issue 14
To: thelist at radiowiki.org.nz
Date: Friday, 23 July, 2010, 2:30 PM

------------------------------

Message: 2
Date: Fri, 23 Jul 2010 11:08:50 +1200
From: Phil W <suckerpunchnz at hotmail.com>
To: Radio Wiki <thelist at radiowiki.org.nz>
Subject: Re: [TheList] Seldec-4 & Selcall+
Message-ID: <SNT125-W25963C8C6645557C8533DDA2A20 at phx.gbl>
Content-Type: text/plain; charset="iso-8859-1"

What do trains use selcalls for?

In a nut shell, the selcals are between the locomotive and Train Control 
which are in Wellington. If the locomotive driver wishes to contact train 
control, then he selects the correct channel for the area he is operating 
in, presses the Call button which sends a tone to Train Control and appears 
on the Train Controllers computer screen as the locomotive number and train 
ID. The train controller can then select which call he will answer by voice..

Same when Train Control wants the locomotive crew, they select the 
locomotive number/train ID and send the selcal which brings up a audio alert 
in the locomotive for the driver to make a voice reply to.

Not sure if selcal based but the locomotive radio system also has a 
emergency function as well, can be operated manually by the driver or 
operates automatically under certain conditions which also sends a tone 
across all the channels to Train Control which brings up a very loud audio 
and visual displayed message on the controllers computer screen which has to 
be answered without delay.

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