6.4. ALPHA TAGGING
6.4.1. GENERAL
Alpha tags are limited to 12 characters to ensure compatibility with older scanners that support only a 12-character alpha tag. Alpha tags shall be made as clear as possible given the space provided. Alpha tags shall generally indicate the agency and the channel number or usage to the extent that the information is known and can reasonably fit in 12 characters. Alpha tags shall use a mix of lower and upper case letters (the use of all capital letters shall be avoided). Alpha tags shall not necessarily be the alpha tag as shown on a radio transceiver programmed for a specific conventional or trunked system. Alpha tags shall be written to be useful to scanner users and furthermore they shall be clear to novice scanner users to the extent possible.
Alpha tags “stand alone” and are not a more specific classification under the category, subcategory and description hierarchy. The alpha tag itself shall only contain information that is also represented in the county/agency/system name, category, subcategory and/or description of the frequency or talkgroup.
If the frequency or talkgroup description is insufficient to provide enough information to create a unique alpha tag, then the frequency or talkgroup number shall be included as part of the alpha tag to ensure uniqueness.