Provides coverage including the United States, Alaska, Hawaii, the Caribbean, and hundreds of miles of coastal waters. Specifies 0.5 - 1.5 GHz frequency (L-Band) -- 4800 bps maximum data rate.
Support remote office staff -- also used for fleet dispatch, maritime and public safety.
Provides North American and Central American coverage -- originally developed to support a remote office staff. Transmits frequencies of 1062 - 1660 MHz, receives frequencies at 1525 - 1559 MHz. Specifies 4800 bps maximum data rate.
Packet Switched Wireless WAN (Cellular Control Channel)
Utilities, measurement, inventory, security and asset/fleet tracking.
Links remote devices to a central monitoring center -- provides coverage capabilities ranging from metropolitan to national. Specifies 800 MHz frequency and 9600 Baud.
Known as dispatch, one-to-many, or push-to-talk service. Allows for two-way communication between a central dispatch point and a mobile workforce or among a mobile workforce -- capable of local or regional coverage. Specifies 800 MHz frequency and 9600 bps maximum data rate (2400 standard data rate).
A 6 satellite system for non-voice communications -- provides data-messaging primarily for, but not limited to, utility applications -- initially U.S. coverage, but global coverage capacity. Specifies 148-148.905 MHz frequency uplink and 137.0725-137.9725 MHz frequency downlink.
Voice and data, unified messaging and positioning.
Provides global coverage for wireless Internet, voice and messaging services. Specifies 1610.0 - 1621.5 uplink and 2483.5 - 2500.0 MHz downlink (expanding to 2 GHz) -- 9.6 bps maximum data rate (expanding to 64 bps).
Public safety, utilities, transportation and various dispatch.
A trunked, two-way radio system used primarily for U.S. and Canadian coverage. Specifies frequency of 800 MHz, available in 900 MHz, VHF, UHF, 25 KHz, wideband and narrowband -- wideband: 9600 Baud, narrowband: 4800 Baud.
Provides global coverage for personal messaging, including e-mail, asset tracking and management, remote monitoring and control management, and computer file transfer for consumers, governments and industry. Specifies UHF/VHF frequency and a maximum data rate of 9.6 bps service link and 50 Kbps ground link (300 bps to 300 Kbps potential).
Voice calling, short messaging, positioning, facsimile and data transmission.
Provides high quality voice, roaming and Short Messaging Service (SMS), global satellite phones -- supports global coverage. Specifies 5091 - 5250 MHz uplink, 6875 - 7055 MHz downlink and 9600 bps maximum data rate.
A U.S. government-developed system that uses satellite triangulation to determine exact locations anywhere on the planet. Specifies frequency of 1575.42 MHz for navigation message, 1227.60 MHz for SPS code signal -- 50 bps maximum data rate.
A grid of radio waves allowing position plotting for sea vessels (primarily in North American waters). Specifies 100 KHz frequency and 500 pulses per second (varies with transceiver).
Packet Switched Wireless WAN (Cellular Control Channel)
Asset tracking, vehicle tracking and fleet management/security.
Allows short data packets to be transmitted over cellular control channels -- proprietary utility serving up to a national coverage area. Specifies 800 Mhz frequency and 50 bps maximum data rate.
Integrates dispatch radio, full duplex telephone interconnect, short message service and future data transmission -- used in U.S. and some international coverage areas. Specifies 800 MHz frequency and 19.2 Kbps.
Integrates terrestrial and satellite communications to provide national coverage. Specifies frequency of 0.5-1.5 GHz Band (L-BAND) -- 2400 Baud uplink and 4800 Baud downlink.
Remote and mobile asset tracking, utilities measurement, various data and messaging.
Provides global coverage for data and messaging, remote and mobile asset tracking. Specifies frequencies of 137-138 MHz and 400 MHz downlink, 148-150 MHz uplink -- 57.6 Kbps maximum data rate.
Mobile workforce, various two-way voice and radio.
Provides extensive coverage capabilities, including national and some international coverage -- used primarily to extend wireless communications to a mobile workforce. Specifies 800 or 900 MHz frequency.
Provides a global coverage area for services, including two-way mobile communications, satellite tracking and remote fleet management. Specifies 12-14 GHz frequency and 9600 Baud.
Transportation, mobile workforce, various two-way voice/radio.
Incorporates narrowband radio channels, microwave, satellite channels and leased lines to create nation-wide networks. Specifies 12.5 or 25 KHz band frequency and a theoretical maximum data rate of 2 Kbps.
Integrates dispatch radio, full duplex telephone interconnect, short message service and future data transmission -- used in U.S. and some international coverage areas. Specifies 800 MHz frequency and 19.2 Kbps.
Provides global coverage using short-wave packet radio, electronic messaging and existing telephone networks -- actively promotes information technology expansion in developing nations.
