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Public Domain - radio trip tic

from mesmeric membrane modulations sweepings by various

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www.w2sjw.com/radio_sounds.html

soundlibrary.bandcamp.com
www.arewrecordings.com/public_domain.html
www.youtube.com/user/pUBlLICd0MAIN
soundcloud.com/public-domain-1

This is the most common form of unit ID found in public safety. This is either broadcast at the start or the end of a unit's transmission (or both, if you so choose to have it programmed that way). The user's radio can also be programmed to emit a tone on key up to remind the user to wait before speaking, as the unit's mic is not activated until the ID is sent This was Motorola's first digital voice solution marketed under the ASTRO name. This was a in-house modification to the Vector Sum Excited Linear Predictive standard that was used in the first TDMA cell phones. Motorola also modified this into the IDEN format that is used by NEXTEL phones (see below). Very few jurisdictions use this type of system anymore (Trenton, NJ & Cleveland, OH). This is not a Project 25-compliant system, and cannot be picked up on any known scanner. Here is a sample of decoded audio. These two new samples are of VSELP being

Central London based duo,
Jane Burton & Doris Lake,
nick named the library girls,
because they both work in cataloging,
cut up recordings.
Their logo is a Hammer and a Cabbage

These sounds are public domain, and may be used by anyone. If you plan to use these for commercial purposes, please have the courtesy to give me credit as the source.

www.radiomuseum.org/r/sanyo_6c_302.html

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from mesmeric membrane modulations sweepings, released January 10, 2018

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