Introduction; Trunked Radio Systems; Passport ® Trunked Systems; Ltr ® Trunked Systems - Motorola HT1250-LS+ User Manual

INTRODUCTION

Welcome to Motorola's HT Series family of radio
users. This user guide supports HT1250•LS+
radios. These radios combine the very latest in
two-way technology while delivering outstanding
functionality at the touch of a button.
HT1250•LS+ portable radios operate on UHF/
VHF PassPort, LTR Trunked, and
Conventional radio systems.
Contact your Motorola dealer for a list of
features available with your radio.

TRUNKED RADIO SYSTEMS

Trunked systems allow a large number of users
to share a relatively small number of
frequencies or repeaters without interfering with
each other. The airtime of all the repeaters in a
Trunked system is pooled, which maximizes
the amount of airtime available to any one radio
and minimizes channel congestion.
®
PassPort Trunked Systems
PassPort is an enhanced trunking protocol
developed by Trident Micro Systems that
supports wide-area dispatch networking. A
network is formed by linking several Trunked
sites together to form a single system. This
offers users an extended communication
™
coverage area. In addition, users with
PassPort-enabled radios can seamlessly roam
among all sites within the network. Seamless
roaming means that you do not have to
manually change the zones on your radio
when roaming from site to site.
®
LTR Trunked Systems
LTR is a transmission-based trunking protocol
developed by the E. F. Johnson Company for
primarily single-site trunking applications. In
transmission trunking, a repeater is used only
for the duration of a single transmission. Once
a transmission is completed, that repeater
becomes available to other users. This means
that a conversation comprised of many
transmissions may occur over several different
channels within the LTR system. This method
of trunking provides system efficiency by
making repeaters available to all users after
every transmission.
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