Sources
Help build the largest human-edited directory on the web.
Submit a site - Become an editor
Wikipedia. Licensed under the GNU Free Documentation License.
Are you an expert in this subject? Join the discussion and share your knowledge at Wikipedia.org.
LTR Standard
From Wikipedia, the free encyclopedia
LTR Standard systems have no dedicated control channel. All control data is sent as subaudible data along with voice transmissions. Systems can have any number of channels from 1 through a maximum of 20. Each channel in the system is assigned a unique number (01 through 20) and these need not be sequentially assigned. Each subscriber radio must be programmed with all channels in the system in proper logical channel order (the same requirement as EDACS systems).
LTR Standard Talkgroups are written in the format A-HH-GGG.
- "A" is the area code and is either 0 or 1. The area code is the same for all Talkgroups in a given system and is arbitrarily chosen by the system operator; the most common use is to simply distinguish between Talkgroups on multiple systems.
- "HH" is the home repeater number and has twenty possible values, 01 through 20.Talkgroups usually use their home repeater by default, unless the repeater is already in use by other Talkgroups. If the home repeater is in use, the controller will assign another free repeater at random. If no repeater is free (all are in use), then the radio will receive a busy signal.
- "GGG" is the group number and has 254 possible values, 001 through 254.
Central controller
Motorola systems: Type I • Type II • Type IIi Hybrid • Type II SmartZone • Type II SmartZone OmniLink • iDEN
Other: APCO Project 16 • APCO Project 25 • EDACS • EDACS Provoice • MPT-1327 • TETRAPOL
Scan-based / distributed control
General Electric Mobile Radio: GE Mark V
Logic Trunked Radio: LTR Standard • LTR Passport • LTR Standard and Passport • LTR MultiNet • LTR-Net