[TrunkCom] RE: DPL On A TRS???

[Wayne M H]

On Wed, 22 Oct 2003 07:10:20 -0500 (GMT-05:00), Tom Consodine ND5Y
<nd5y@earthlink.net> wrote:

>If you listen carefully (with bassy headphones)
>you will hear a low level digital signal that sounds just like DPL or =
LTR data
>on Motorola voice channel outputs and on both the inputs and
>outputs on EDACS systems.
>Motorola systems use a connect tone on the input (like PL)
>
>I suspect that part of the reason for these is to help keep out
>far away systems using the same frequencies and talkgroups.
>
>I don't think it would be possible to use DPL or PL on a trunked system.
>
>Can any of the experts on the list tell me if I'm right and explain =
more?

You're correct. In order for the trunked system to accept a call on a
voice channel it requires the mobile ot transmit a connect tone on the
input. The radio also needs to receive the low-speed data on the
output. AFAIK, this is the same for EDACS.

DPL is NOT used with trunking. It totally defeats the purpose of
either one.

-Wayne