[TrunkCom] Astro/APCO25

[Brian J Cathcart]

On Mon, 15 Apr 2002 21:11:32 -0500 sly.debbie@verizon.net writes:
> Motorola digital Astro system is not APCO25 compatible right?


Yes and no, it depends which Astro you are talking about.  Motorola has
called all of their digital systems Astro, both their non-APCO-25 digital
system and APCO-25 digital systems.  What you have out there is:

- Astro systems using the non-P25 3600 baud control channel with the
VSELP (non-P25) vocoder [example: Celeveland, OH and Memphis, TN]

- Astro systems using the non-P25 3600 baud control channel with the IMBE
(P25) vocoder [called "Astro CAI"] [several examples, such as state of
Florida, Boca Raton, etc]

- Astro systems using the P25 9600 baud control channel with the IMBE
(P25) vocoder [state of Michigan]

All of these are called "Astro" systems.

--

The Scanner Dude
Brian J. Cathcart - KE4PMJ
South Florida Frequency & Trunking Guide - 6th Edition (On CD-ROM too!)