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Astro (Motorola)
ASTRO 25 is the next generation of ASTRO digital two-way radio communications by Motorola Solutions. Motorola first introduced digital two-way radio in the U.S. in 1991 under the name ASTRO Digital Solutions. With the completion of the APCO Project 25 standard, Motorola introduced the ASTRO 25 solution and migrated its ASTRO Digital Solutions customers to ASTRO 25. Project 25 (also known as P25) is a suite of standards for digital radio communications that is designed specifically for law enforcement, fire and medical services to communicate with each other during emergency situations.Project 25 ASTRO 25 is now the most widely used P25 mission critical voice and data communication network in the world. It is designed to provide reliable and always available communication for public safety agencies. The Original ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Motorola Solutions
Motorola Solutions, Inc., is an American video equipment, telecommunications equipment, software, systems and services provider that succeeded Motorola, Inc., following the spinoff of the mobile phone division into Motorola Mobility in 2011. The company is headquartered in Chicago, Illinois. History Motorola Solutions began trading as a separate independent company on January 4, 2011, under the NYSE symbol MSI. In April 2011, Motorola Solutions completed the sale of its cellular infrastructure business to Nokia Siemens Networks for $975 million in cash. As part of the transaction, approximately 6,900 employees were transferred to Nokia Siemens Networks. The same month, Chinese telecommunications company Huawei and Motorola Solutions settled their intellectual property disputes. In 2012 Motorola Solutions purchased Psion for $200million and added it to its Enterprise business. A large majority of the Enterprise business was formerly Symbol Technologies, which Motorola, Inc. had ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bushfires In Australia
Bushfires in Australia are a widespread and regular occurrence that have contributed significantly to shaping the nature of the continent over millions of years. Eastern Australia is one of the most fire-prone regions of the world, and its predominant eucalyptus forests have evolved to thrive on the phenomenon of bushfire. However, the fires can cause significant property damage and loss of both human and animal life. Bushfires have killed approximately 800 people in Australia since 1851, and billions of animals. The most destructive fires are usually preceded by extreme high temperatures, low relative humidity and strong winds, which combine to create ideal conditions for the rapid spread of fire. Severe fire storms are often named according to the day on which they peaked, including the five most deadly blazes: Black Saturday 2009 in Victoria (173 people killed, 2,000 homes lost); Ash Wednesday 1983 in Victoria and South Australia (75 dead, nearly 1,900 homes); Black Frida ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
FIPS 140-2
The Federal Information Processing Standard Publication 140-2, (FIPS PUB 140-2), is a U.S. government computer security standard used to approve cryptographic modules. The title is ''Security Requirements for Cryptographic Modules''. Initial publication was on May 25, 2001, and was last updated December 3, 2002. Its successor, FIPS 140-3, was approved on March 22, 2019, and became effective on September 22, 2019. FIPS 140-3 testing began on September 22, 2020, although no FIPS 140-3 validation certificates have been issued yet. FIPS 140-2 testing was still available until September 21, 2021 (later changed for applications already in progress to April 1, 2022), creating an overlapping transition period of more than one year. FIPS 140-2 test reports that remain in the CMVP queue will still be granted validations after that date, but all FIPS 140-2 validations will be moved to the Historical List on September 21, 2026 regardless of their actual final validation date. Purpose The ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
United States Department Of Defense
The United States Department of Defense (DoD, USDOD or DOD) is an executive branch department of the federal government charged with coordinating and supervising all agencies and functions of the government directly related to national security and the United States Armed Forces. The DoD is the largest employer in the world, with over 1.34 million active-duty service members (soldiers, marines, sailors, airmen, and guardians) as of June 2022. The DoD also maintains over 778,000 National Guard and reservists, and over 747,000 civilians bringing the total to over 2.87 million employees. Headquartered at the Pentagon in Arlington, Virginia, just outside Washington, D.C., the DoD's stated mission is to provide "the military forces needed to deter war and ensure our nation's security". The Department of Defense is headed by the secretary of defense, a cabinet-level head who reports directly to the president of the United States. Beneath the Department of Defense are th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Apopka, FL
Apopka is a city in Orange County, Florida. The city's population was 55,000 at the 2020 census. It is part of the Orlando–Kissimmee–Sanford Metropolitan Statistical Area. ''Apopka'' comes from Seminole word ''Ahapopka'' for "Potato eating place". Apopka is referred to as the "Indoor Foliage Capital of the World" due to the many greenhouse nurseries there. History The earliest known inhabitants of the Apopka area were the Acuera people, members of the Timucua confederation. They had disappeared by 1730, probably decimated by diseases transmitted through Florida by Spanish colonists. The Acuera were succeeded by refugees from Alabama and Georgia, who formed the new Seminole Indian tribe. They called the area ''Ahapopka''. Aha, meaning "Potato," and papka, meaning "eating place". By the 1830s, this settlement numbered about 200, and was the birthplace of the chief Coacoochee (known in English as "Wild Cat"). At the conclusion of the Second Seminole War, the U.S. Congress ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Frequency-division Multiple Access
Frequency-division multiple access (FDMA) is a channel access method used in some multiple-access protocols. FDMA allows multiple users to send data through a single communication channel, such as a coaxial cable or microwave beam, by dividing the bandwidth of the channel into separate non-overlapping frequency sub-channels and allocating each sub-channel to a separate user. Users can send data through a subchannel by modulating it on a carrier wave at the subchannel's frequency. It is used in satellite communication systems and telephone trunklines. FDMA splits the total bandwidth into multiple channels. Each ground station on the earth is allocated a particular frequency group (or a range of frequencies). Within each group, the ground station can allocate different frequencies to individual channels, which are used by different stations connected to that ground station. Before the transmission begins, the transmitting ground station looks for an empty channel within the fre ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Time Division Multiple Access
Time-division multiple access (TDMA) is a channel access method for shared-medium networks. It allows several users to share the same frequency channel by dividing the signal into different time slots. The users transmit in rapid succession, one after the other, each using its own time slot. This allows multiple stations to share the same transmission medium (e.g. radio frequency channel) while using only a part of its channel capacity. Dynamic TDMA is a TDMA variant that dynamically reserves a variable number of time slots in each frame to variable bit-rate data streams, based on the traffic demand of each data stream. TDMA is used in the digital 2G cellular systems such as Global System for Mobile Communications (GSM), IS-136, Personal Digital Cellular (PDC) and iDEN, and in the Digital Enhanced Cordless Telecommunications (DECT) standard for portable phones. TDMA was first used in satellite communication systems by Western Union in its Westar 3 communications satellite ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
P25 ISSI
{{no footnotes, date=March 2015 The Project 25 Inter RF Subsystem Interface ( P25 ISSI) is a non-proprietary interface that enables RF subsystems (RFSSs) built by different manufacturers to be connected together into wide area networks so that users on different networks can talk with each other. The wide area network connections using the ISSI provide an extended coverage area for subscriber units (SUs) that are roaming. The extended coverage area is important for public safety first responders that provide assistance in other jurisdictions during an emergency. The ISSI supports the messaging, and procedures necessary to enable RFSSs to track and locate SUs, set up and teardown calls and transfer voice information to the SUs. The ISSI uses SIP and RTP protocols (standardized protocols) to provide the messaging between RFSSs. The modern Land Mobile Radio (LMR) system includes many features in addition to voice communication. Many features will not work across systems connecte ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Janet Napolitano
Janet Ann Napolitano (; born November 29, 1957) is an American politician, lawyer, and university administrator who served as the 21st governor of Arizona from 2003 to 2009 and third United States secretary of homeland security from 2009 to 2013, under President Barack Obama. She was named president of the University of California system in September 2013, and stepped down from that position on August 1, 2020 to join the faculty at the Goldman School of Public Policy. She was elected to the American Philosophical Society in 2018. Prior to her election as governor, she served as attorney general of Arizona from 1999 to 2003. She was the first woman and the 23rd person to serve in that office. Napolitano had earlier served as the United States attorney for the District of Arizona. She has been the first woman to serve in several offices, including attorney general of Arizona, secretary of homeland security, and president of the University of California. ''Forbes'' ranked her a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Inter RF Subsystem Interface
Project 25 (P25 or APCO-25) is a suite of standards for interoperable digital two-way radio products. P25 was developed by public safety professionals in North America and has gained acceptance for public safety, security, public service, and commercial applications worldwide. P25 radios are a direct replacement for analog UHF (typically FM) radios, but add the ability to transfer data as well as voice, allowing for more natural implementations of encryption and text messaging. P25 radios are commonly implemented by dispatch organizations, such as police, fire, ambulance and emergency rescue service, using vehicle-mounted radios combined with repeaters and handheld walkie-talkie use. Starting around 2012, products became available with the newer phase 2 modulation protocol, the older protocol known as P25 became P25 phase 1. P25 phase 2 products use the more advanced AMBE2+ vocoder, which allows audio to pass through a more compressed bitstream and provides two TDMA voice ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Las Vegas Metropolitan Police Department
The Las Vegas Metropolitan Police Department (also known as the LVMPD or Metro) is a combined city and county law enforcement agency for the City of Las Vegas and Clark County, Nevada, United States. It is headed by the Sheriff of Clark County, who is publicly elected every four years. Sheriff Joe Lombardo has headed the department since January 5, 2015. The sheriff is the only elected head law enforcement officer within the county, and, as such, the department is not under the direct control of its jurisdictional cities, Clark County, or the State of Nevada. Metro is the largest law enforcement agency in Nevada, and in 2009, was one of the largest police agencies in the United States according to Uniform Crime Reporting by the Federal Bureau of Investigation. History The Vegas Metropolitan Police Department (LVMPD) was formed on July 1, 1969, by merging the Las Vegas Police Department with the Clark County Sheriff's Department. Metro serves the city limits of Las Vegas and the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Motorola Products
This is a list of Motorola products. Motorola Mobility is an American subsidiary company of Chinese multinational technology company Lenovo that manufactures consumer electronics and telecommunications products. Computers Laptops * ML910 * MW810 * MW800 * ML900 * ML850 * ML950 *MNope2 Handheld * HC700 series * Symbol Technologies line of products * HYT * ICOM * Motorola * MotoG Mobile VHF UHF Two way Radio * Motorola VHF MT 1000 * Motorola UHF GP 388 GP 388 * Motorola VHF GM 300 * Motorola VHF UHF Repeater MSR 2000, GR 500, MTR 2000 StarMax * StarMax 3000 * StarMax 4000 * StarMax 5000 * StarMax 5500 Home and consumer products * Vintage radio and television receivers * Follow Me TV * m25 (256 MB) and m500 (5 GB) digital audio players * iRadio music subscription service Cordless phones * C series: C50, C51, C51, C70 * E series: E30, E31, E32, E33, E34, E51, E51, E52 * T series: T31 * MA3100 series (2.4 GHz): MA3153, MA3163 * MD4100 series (2.4 GHz digital): MD ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
