User's Guide

5.4
Capacity Plus
Capacity Plus is a cost effective and entry-level digital trunked system. It expands the capacity and
extends the coverage for single and multi-sites. The single and multi-sites dynamic trunking offers
better capacity and coverage.
NOTE: If you try to access a feature not applicable to Capacity Plus–Single-Site or Capacity
Plus–Multi-Site by using a programmable button, you hear a negative indicator tone.
Capacity Plus–Single-Site
Capacity Plus–Single-Site is a single-site trunking configuration of the MOTOTRBO radio system,
which uses a pool of channels to support hundreds of users and up to 254 groups.
This configuration allows your radio to efficiently utilize the number of available programmed channels
while in Repeater Mode.
Your radio also has features that are available in conventional digital mode, IP Site Connect, and
Capacity Plus.
Capacity Plus–Multi-Site
Capacity Plus–Multi-Site is a multi-channel trunking configuration of the MOTOTRBO radio system,
combining the best of both Capacity Plus and IP Site Connect configurations. It is also known as
Linked Capacity Plus.
It allows your radio to extend trunking communication beyond the reach of a single site, by connecting
to different available sites which are connected with an IP network. It also provides an increase in
capacity by efficiently utilizing the combined number of available programmed channels supported by
each of the available sites.
When your radio moves out of range of one site and into the range of another, it connects to the
repeater of the new site to send or receive calls or data transmissions. Depending on your settings, this
is done automatically or manually.
Automatically
Your radio scans through all available sites when the signal from the current site is weak or unable
to detect any signal and locks on to the repeater with the strongest RSSI value.
Manually
Your radio searches for the next site in the roam list that is currently in range which may not have
the strongest signal, and locks on to it.
Any channel with Capacity Plus Multi-Site enabled can be added to a roam list. Your radio searches
these channels during the automatic roam operation to locate the best site.
NOTE: You cannot manually add or delete an entry in the roam list.
5.5
Direct Mode or Dual Capacity Direct Mode
If within the customer’s required coverage area, any system user can directly communicate with all of
the other system users with just the output power of the transmitter in their portable or mobile radio,
then a direct mode or dual capacity direct mode system can be used.
Direct Mode or Dual Capacity Direct Mode (DCDM) is direct radio-to-radio communication for systems
that do not use a repeater. When radios operate in direct mode or dual capacity direct mode, the
radios always transmit and receive on the same frequency. Direct mode and dual capacity direct mode
provide similar services to the end users, with the exception that dual capacity direct mode is only
available in digital mode, and supports two simultaneous voice or data paths on a 12.5 kHz bandwidth
MN007848A01-AB
Chapter 5 : System Overview
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