System Feature Overview 19
68007024085 April 2011
network. If one logical channel of a repeater is configured to the Capacity Plus mode, then
the other logical channel will also be in the same mode.
In a Capacity Plus configuration, MOTOTRBO systems support all previous digital
repeater mode features, with the exception of the following:
• Scan: Capacity Plus supports Group Scan but does not support scanning channels of
another system. As the radios are in a trunked system, scanning the Trunked Channels
is not required.
• Emergency Revert Channel: Capacity Plus does not support a revert channel for
emergency because probability of all Trunked Channels becoming busy is low.
However, reverting to an emergency group is supported. This promotes a centralized
handling of an emergency situation.
• IP Site Connect configuration: Capacity Plus is a single site system and therefore
does not support features related to IP Site Connect configuration such as wide-area
coverage and automatic roaming. However, a radio can be programmed with multiple
channels in multiple zones, one of which could be a Capacity Plus system, another an
IP Site Connect System, and others could be MOTOTRBO conventional channels or
Analog conventional channels.
• Impolite calls: Capacity Plus supports impolite Emergency Call and impolite
transmissions (i.e. Group members can transmit over an ongoing call). A new call
always starts on an idle channel and therefore, a radio does not start a non-Emergency
Call impolitely.
• Talkaround mode: A radio can have a talkaround personality but in Capacity Plus
mode, there is no talkaround option.
• Monitoring of channels status: Monitoring is important in a conventional system,
where a radio stays on a channel. In Capacity Plus, a radio moves from one Rest
Channel to another. Most of the Rest Channels are in an idle state and therefore,
monitoring is not necessarily needed.
• Fragmentation of a Data Packet: Capacity Plus does not fragment a data packet
before transmitting over-the-air. Thus, the size of an IP datagram (including IP and UDP
headers) should be less than the maximum size of the Packet Data Unit. The value of
the Packet Data Unit is a CPS programmable parameter with a maximum size of 1500
bytes.
• Option Board: If the Option Board feature is enabled for Capacity Plus, then the feature
is automatically enabled for all trunked and revert channels of a Capacity Plus system.
On a Capacity Plus personality, the Option Board is not aware of the transmit or receive
channel. Additionally, an Option Board does not use or create Virtual Personalities in a
Capacity Plus system. Hence, an Option Board will not be able to customize the current
working personality.
• Transmit Interrupt: The Voice Interrupt, Emergency Voice Interrupt, Remote Voice
Dekey, and Data Over Voice Interrupt features are supported on Capacity Plus systems
running on software version R01.07.00 or later.
Capacity Plus does not provide the following features:
• Coverage of multiple sites,
• Call queuing, priority, and preemption,
• Priority Monitor: Capacity Plus provides higher priority only to an All Call,
• Radio access control.
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