GEMINI-128 Inmarsat-M4 Dual High Speed Data Terminal 

128 Kbps vs. 64 Kbps

MTI will also supply the Gemini-128, Inmarsat-M4 Dual High Speed Data Terminal from late August 2000. The Antenna/Outdoor Unit is remoteable up to 500 ft away from the Control Console/Indoor Unit.

GEMINI-128
Inmarsat-M4 Dual High Speed Data Terminal

Reliable, high quality 128 kbps data services are now available virtually anyplace in the world using Glocom’s unique dual-channel Inmarsat M-4 technology. The GEMINI-128 is your solution to delivering full ISDN-2B service that fully supports your 128 kbps application:

• Higher Quality Video
• Faster File Transfer
• Encryption (STE, STU-III, others)
• Fast Internet Services
• Multiplexed Voice and Data

Establishing a 128 kbps or 64 kbps Mobile Telesystems, Inc. satellite data link no longer needs to be a complicated, time consuming, and expensive process. Glocom’s GEMINI-128 solves the problems of the past by incorporating today’s data communication standards in a package that is the easiest to install, operate and maintain in your real-world applications.

128 Kbps ARCHITECTURE FOR ISDN AND INTERNET

The architecture of the GEMINI-128 is based on Glocom’s innovation Notebook-64 single-channel Inmarsat-M4 portable terminal. It uses the same compact, user friendly IDU/operator console combined with a dual-channel ODU/Antenna. The result is a compact, light-weight 128 kbps terminal with capabilities that far surpasses those of any other mobile satellite terminal.

• Readily connects with user equipment employing current data and voice interface standards
• Accommodates both European and North American ISDN interfaces
• Fast, convenient installation and setup at any location
• Truly simple operation
• Withstands the physical abuse typical of many mobile satellite applications
• Offers a firmware-only up grade to the future Inmarsat Packet Data Service (IPDS)

DATA INTERFACING - @ ITS BEST

The GEMINI-128 accepts plug-in Interface and Configuration Cartridges (ICCs) for the both ISDN-ST (standard) and ISDN-U (optional). These cartridges not only provide the appropriate electrical interface and connector, but also automatically configure the terminal and negotiate the optimum transmission parameters with the distant node…eliminating the need for ISDN Terminal Adapters, special adapter cables, and protocol converters.

ANTENNA PLACEMENT AND POINTING - @ ITS BEST

This unique architecture of the GEMINI-128 locates all of the RF components in the

weatherproof antenna unit. The antenna cable carries no RF signals and can be up to 500

ft. (150m) long using industry standard CAT-5,/” in (6.4 mm) diameter cable. 

Pointing the antenna is greatly simplified by a signal strength indicator built into the ODU. The operator can quickly and accurately point the antenna with no prior knowledge of the direction to the satellite.

OPERATOR FRIENDLINESS - @ ITS BEST

The GEMINI-128’s large graphic display provides the operator with a clear picture of all

Important functions at a single glance. The back lighted display includes a graphic aid that makes antenna pointing as simple as moving a cursor to your approximate location on a world map. 

MECHANICAL CONSTRUCTION - @ ITS BEST

The industrial design of the GEMINI-128 anticipates the severe environments typical of mobile satellite applications. Magnesium alloy castings are used for housing both the IDU and ODU to obtain industrial-grade durability without excessive weight. The ODU housing is completely sealed to assure reliable operation during prolonged exposure to the elements.  

R3 CUSTOMER SERVICE - @ ITS BEST  

In order to assure that our customers are not without service for an extended period of time, Glocom and our Authorized Dealers have implemented a process for Rapid Replacement in lieu of repair – R3.

At any time during the warranty period the end-user has the option of wither returning a defective unit for repair under the standard warranty terms, or requesting the R3 option.

A near – new replacement unit will be shipped to you within 24 hours. The nominal fee for the R3 service covers refurbishment of the returned unit to near – new condition, and expedited shipped.

GEMINI-128 PRODUCT DESCRIPTION 

Portable, dual-channel Inmarsat-M4 satellite communications terminal providing voice and 128 kbps data service. Available with plug-in Interface and Configuration Cartridges (ICCs) to accommodate either the ISDN S/T or ISDN-U data interface standards. Antenna/Outdoor Unit is remoteable up to 500 ft (150 m) away from the Control Console/Indoor Unit. Featuring light-weight magnesium alloy construction and a weatherproof outdoor unit.

Physical Characteristics

• ODU: 31” (H) x 31” (W) x 3.2” ( D)
• IDU: 1.5” (H) x 9.5” (W) x 6” (D)
• Total Weight: < 15 lb with battery
• Environmental Conditions: 
  • Temperature: -25° to + 55° C (battery capacity will degrade in low temperatures)
  • Relative Humidity: < 95% non-condensing @ 40° C 

Electrical Characteristics

• Power Supply: Built-in Battery: Lithium-Ion rechargeable, 4800 mAH 14.4V
• External Power Input: 24 VDC/100 Watt
• Power Consumption: Standby (sleep mode operation): < 0.6 Watt
• Single channel M4 Transmission: About 35 Watts
• Single channel M4 Transmission Time: > 1.0 hour

Interface Specifications

• Air Interface Specifications: Tx frequency tuning range: 1626.5 – 1660.5 MHz
• Rx frequency turning range: 1525 – 1559 MHz
• Channel spacing: 1.25 KHz

Baseband Interface

• ISDN NT1 S/T: ITUT I.430, RJ-45 connector, Euro-ISDN compliant Q.931, Q.921 for D-channel signaling.
• ISDN NT1 U: NAST T1.601, RJ-45 connector, built-in TCP/IP, PPP, ML-PPP, DHSP and NAT IP routing functions.
• SIM Card Interface: Industrial standard Smart Card Interface, compliant to ISO-7816. For dual channel operation, one channel must6 use the hardware MES ID.