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County of Maui
System Type: E.F. Johnson MultiNet II
RF Band: 800 MHz (806-808 MHz & 851-853 MHz)
Maui County
is in the process of converting their LTR Multi Net II system
into a Project 25 CAI (common air interface radio system) by EF
Johnson. It is unknown if digital scanners like the Pro-96 will
be able to track such a system. More information will be available
when the system goes online -- expected late 2008 or sometime
in 2009.
Introduction
Recognizing the need to integrate all county agencies to communicate
with each other using a single radio system, Maui County teamed
up with EF Johnson and implemented an 800 MHz LTR Multi Net II
system.
System Layout
The 800 MHz Maui County LTR MultiNet trunked radio system is
comprised of ten repeater sites located on the islands of Maui,
Molokai, Lanai, and Hawaii. Analog modulation is used for all
transmissions, but some encryption is used (unknown algorithm)
for sensitive traffic. It is a multiple repeater semi-simulcast
system with each site having multiple frequencies. Transmissions
may be simulcast across several repeater systems, or may be specific
to only one system.
System Users
- Maui Police Department
- Maui Fire Department
- Maui EMS (Dispatch Only)
- Civil Defense
- Lifeguards "LG" units
- Animal Control "AC" units
- Public Works
Scanning an LTR Multi Net II Trunked Radio System
Multi Net II is one of several LTR derivatives to hit the two-way
radio market. Unlike regular LTR systems that can be scanned with
Trunk Tracker II or higher models, derivatives like Multi Net
II can be scanned, but whole conversations cannot be followed
correctly with any scanner if the system decides to switch the
conversation to another frequency -- users will have to manually
switch to the 'other' frequency.
Multi Net II trunked radio systems operate similarly to a regular
LTR system. Users are still assigned a "home channel" and all
conversations take place on the home channel when there is less
than normal system traffic. As the system receives more than normal
system traffic, this is where the frequency-hopping characteristic
takes over. The system will first check the home channel if it
is busy. If it is, the user will be assigned one of several secondary
channels to make their call. The basic trunking backbone (i.e.
talkgroups) still exist to keep users affiliated with each other.
If a user was tuned to Wailuku Patrol and a call needed to be
made on a secondary channel, all radios listening to Wailuku Patrol
will switch to the new working frequency automatically to hear
the transmission, then switch back and monitor the home channel
when the transmission is complete.
System Information
Sites: 2
Control Channel Only Mode: PLAN 3
System Frequencies
KAHULUI & WAILUKU CENTRAL (This is a remote base system within this area)
851.1000, 851.6000, 852.1000, 852.6000, 853.1000, 853.6000
WPJR553, Site 1 - Puu Nainaiu, Maui (Upcountry)
851.2375, 851.7375, 852.2125, 852.7125, 852.9625, 853.2625, 853.7125
WPJR556, Site 1 - Pu'u O Hoku Ranch, East Molokai
851.2125, 851.4625, 853.9625
WPJR556, Site 2 - Lanai City, Lanai
851.7125, 853.2125, 853.7625
WPJR556, Site 3 - Maunaloa, Molokai
851.2625, 852.2625, 853.9875
WPJR556, Site 4 - Waiakeakua, Lanai *Confirmed 3/01
851.7625, 852.2375, 852.7375, 853.2125, 853.4625, 853.7375
WPJR556, Site 5 - Kahua Ranch, Hawaii *Confirmed 7/01
851.9625, 852.4625, 852.7625
WPJR556, Site 6 - Keanae, Maui
851.2625, 851.5125, 853.9875
WPJR557, Site 1 - Hana Airport, Maui
851.2375, 851.7125, 853.7625
WPJR558, Site 1 - Hana GTE Mobile Net Site
851.2125, 851.4625, 853.9625
WPKV205, Site 1 - Puu Nana (Maunaloa, Molokai)
851.9625, 852.4625, 852.7625, 853.2375, 853.5125
WPKV205, Site 1A - Puu Nana (Maunaloa, Molokai)
851.2375, 852.4625, 852.7625, 853.2375, 853.5125
System Talkgroups
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UNKNOWN GROUPS
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