[GreenKeys] GreenKeys Digest, Vol 109, Issue 58

[COURYHOUSE at aol.com]

In a message dated 2/17/2013 9:44:14 P.M. Mountain Standard Time,  
nagle at animats.com writes:

On  2/17/2013 8:11 PM, greenkeys-request at mailman.qth.net wrote:
> Date: Sun,  17 Feb 2013 23:11:54 -0500 (EST)
> From: COURYHOUSE at aol.com
> To:  COURYHOUSE at aol.com, greenkeys at mailman.qth.net
> Subject: Re: [GreenKeys]  Teletypes in police stations... anyone done a
>     definitive  stud...

> I  found the below  bell labs  ad   floating out there  a while back 
but...  
> not  on  the  police...
>>From what Ralph  tells  us --  things  got  sent on a loop to  all ttys   
>  but  only  some  printed... whereas this  system  here   seems to be a 
fully 
> switched   system?
>  
> I  guess  I am   curious   how the    police station  would   talk   out 
to 
> other  things   would the  system  than also work something like   this   
 one  
> below where they could select  a target to type   to?!

Small departments (a few police stations) often had  a simple loop
through all the stations, so anybody could send to  everybody.

State systems like Michigan's were often  polled multidrop
systems, where outgoing messages were prepared on tape,  put in
a TD, and picked up the next time the poller sent the  appropriate
poll sequence to the stunt box.  That's what those big  28ASRs
with all the extra features were for.  A Plan 55-A office
(a  building full of reperfs and switchgear) could manage a network
like that,  but by the 1960s, Michigan was using a program on a
small Burroughs  mainframe to run the net.

John Nagle


________
Interesting the  messages  were  "picked up"  by a  polled method.
 
at  some point   police stations were able to inquire into  'crime 
databases'   in the   long before  PC  era...as  I  dimly  remember...
 
when  and  how  was this accomplished?
 
wasn't there a FBI  database  etc...???
 

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