EDACS System - Can It be Monitored?

Joseph Cardani

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Jul 1, 1996, 3:00:00 AM7/1/96

to

I was wondering whether an EDACS trunked radio system can be
monitored. I am familiar with the Motorola systems, but there are no
public service agencies nearby that use EDACS. A local police
department is considering using the EDACS system.

Thanks,

Joe Cardani

NewsRadio

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Jul 2, 1996, 3:00:00 AM7/2/96

to Joseph Cardani

Joseph Cardani wrote:
>
> I was wondering whether an EDACS trunked radio system can be
> monitored. I am familiar with the Motorola systems, but there are no

Hi Joe,

A local police dept here is planning to go to edacs digital. The Metro
Toronto ambulance is using an ericsson system (not sure if its
technically edacs or not). That system is analogue and is "moniterable"
however, at the end of each transmission after the repeater hang time,
there is a burst of tones (called the "Ge jingle" since it sounds like
the "we bring good things to life jingle used in GE commercials) which
locks up your scanner for 2-3 secconds (while the conversation is
continuing on another frequency!). However, with the edacs digital, the
audio is all digitized and cannot be monitored with a conventional
scanner.

--------------------------------------------
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David Fredriksson

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Jul 4, 1996, 3:00:00 AM7/4/96

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Hi "News Radio"

Just a notification for you. EDACS used to have analoge speech in its
older versions but newer systems are, as you said digital all the way.
That means that older systems of EDACS can be monitored and newer
cannot. Digital EDACS has also the option of very (DES-type) safe
encryption.

Rgrds David Fredriksson

ShermBob

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Jul 6, 1996, 3:00:00 AM7/6/96

to

Joseph Cardani (Joseph....@mail.tju.edu) wrote:
: I was wondering whether an EDACS trunked radio system can be
: monitored. I am familiar with the Motorola systems, but there are no

: public service agencies nearby that use EDACS. A local police

: department is considering using the EDACS system.

Any system can be monitored with the proper equipment. There are 2 public
safety agencies in this area using EDACS systems, and we monitor both of them
quite well, using EDACS equipment of course.

John Moran

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Jul 6, 1996, 3:00:00 AM7/6/96

to

sure:
example if they use 856.7375, 857.7575, 858.7375, 859.7375, 860.7375
put all these in your scanner in adjacent channels...and have at it!!
turn the delay off!!

---
JOHN/PHX (jam...@analon.com) computing & making good Chemistry!
-------

NewsRadio (jmc...@interlog.com) wrote:

: Joseph Cardani wrote:
: >
: > I was wondering whether an EDACS trunked radio system can be
: > monitored. I am familiar with the Motorola systems, but there are no

: Hi Joe,

J.W. Wolfington

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Jul 7, 1996, 3:00:00 AM7/7/96

to

On 6 Jul 1996 14:04:11 GMT, jam...@indirect.com (John Moran) wrote:

>sure:
>example if they use 856.7375, 857.7575, 858.7375, 859.7375, 860.7375
>put all these in your scanner in adjacent channels...and have at it!!
>turn the delay off!!
>

Right! Then sit back and enjoy all the wonderful sounds of DIGITAL
DATA.

K. Bailey

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Jul 9, 1996, 3:00:00 AM7/9/96

to

> On 6 Jul 1996 14:04:11 GMT, jam...@indirect.com (John Moran) wrote:
> >sure:
> >example if they use 856.7375, 857.7575, 858.7375, 859.7375, 860.7375
> >put all these in your scanner in adjacent channels...and have at it!!
> >turn the delay off!!
> >

> J.W. Wolfington wrote:
> Right! Then sit back and enjoy all the wonderful sounds of DIGITAL
> DATA.

The original question was on how to MONITOR digital communications, not on
how to UNDERSTAND them!

Mr. Moran's responce was 100% correct!

Kdb

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Jim Poll

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Jul 13, 1996, 3:00:00 AM7/13/96

to

K. Bailey wrote:
>
> > On 6 Jul 1996 14:04:11 GMT, jam...@indirect.com (John Moran) wrote:
> > J.W. Wolfington wrote:
> > Right! Then sit back and enjoy all the wonderful sounds of DIGITAL
> > DATA.
>
> The original question was on how to MONITOR digital communications, not on
> how to UNDERSTAND them!
>
> Mr. Moran's responce was 100% correct!
>
> Kdb
>

For an interesting perspective (the EDACS vendor) plus some timelines when the
EDACS system incorporated 'digital' (ala TDMA style) check out: www.ericsson.com

This 'homepage' for the vendor who also supplied the equpiment for the Digital
Cellular system in the Dallas-Fort Worth MSA (11 counties plus
the Sherman/Denison MSA makes 12 counties) also gives some good insight into
digital cellular: TDMA/IS-136 (operational in Dallas/Fort Worth) and CDMA/IS-95
(under going testing - commercial use soon)

Regards, Jim, System Deisgn Eng formerly with AT&T Wireless Services in Dallas

"The things I could talk about if I could only talk about them"

Jim Poll

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Jul 13, 1996, 3:00:00 AM7/13/96

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ShermBob wrote:
> snip

> : I was wondering whether an EDACS trunked radio system can be

> : monitored. I am familiar with the Motorola systems, but there are nosnip

> safety agencies in this area using EDACS systems, and we monitor both of them
> quite well, using EDACS equipment of course.

The Ericsson perspective can be found on the following page:

http://www.ericsson.com/EPI/BR/1edacsmk.html

Regards, Jim