Cobham Explorer PTT - Interoperable Push to Talk Hybrid System
EXPLORER PTT extends legacy Push-To-Talk capabilities to hybrid data networks such as terrestrial 3G/4G/LTE cellular networks (where available), supplemented by the Inmarsat BGAN satellite network where no terrestrial network coverage is present. This, combined with Land Mobile Radio (LMR) integration, provides seamless voice communication in any situation.
BEYOND LINE-OF-SIGHT COMMUNICATION
EXPLORER Push-To-Talk (PTT) is a rugged voice and communication system. It is a cost effective, IP based voice and data communication system designed to extent or replace VHF/UHF based trunk radio systems widely used in the field service, search and rescue, utility, mining and Oil & Gas sectors. The system extends classical Push– To-Talk capabilities to hybrid data networks such as terrestrial cellular networks where available supplemented by the Inmarsat BGAN satellite network where no terrestrial network coverage is present. With no user intervention required the system automatically routes voice and data traffic via the least expensive network available.
EXPLORER PTT turns traditional satellite communication, cellular networks and the internet into a closed managed Wide Area Network with beyond line-of-sight communication.
The EXPLORER PTT solution solves many of the built-in challenges of a VHF system: The use of BGAN and already existing cellular networks extends the coverage area. Improved voice quality with IP based digital voice quality compared to the analogue VHF voice quality. No expensive infrastructure and lower maintenance costs. High quality voice and an on-the-move internet connection. The look and feel is exactly like a VHF system - only a few buttons and easy push to transmit communication. A car installation includes a vehiular BGAN terminal and a Push-To-Talk terminal with a Control Speaker Microphone. Up to two USB modems (optional) can be connected to the base station supporting two independent cellular networks. The all important built-in least cost routing functionality enables automatic switching between the available networks: Uses cellular networks as default.
If one of the cellular networks is congested or unavailable the system will automatically switch to the other cellular network. If limited or no cellular coverage the system will switch to the Inmarsat BGAN satellite network.
Faced with high maintenance costs, poor VHF voice quality and limited coverage the company was looking for an alternative. The EXPLORER PTT solution solved the majority of the built-in challenges of the previous VHF system.
The look and feel is exactly like the replaced VHF system - only a few buttons and easy push to transmit communication. A car installation includes a vehicular EXPLORER 325 BGAN terminal and a Push-To-Talk terminal with a hand microphone (fist-mike). Two USB modem is connected to the base station supporting two independent cellular networks. The all important built-in least cost routing functionality enables automatic switching between the available networks:
The mobile part of the PTT system consists of:
The fist-mike is connected to the PTT box and gives the user a “VHFradio-like” experience. The PTT box has several ways of communicating with the PTT servers, either through the BGAN network or one of the 2G/3G/GPRS modems.
The user interface of the PTT box is simple to use with only a dialbutton, a few LEDs and a combined volume control/on-off button. Once the user presses the dial-button a VoIP connection is established between the PTT box and the dispatcher. When the dispatcher answers the call, a simplex communication channel is available. In the same way the dispatcher may call the mobile unit; to answer the call the mobile user simply presses the dial button.
In order to secure communication, the PTT box must always be connected to an EXPLORER BGAN terminal but can also use up to two 2G/3G/GPRS cellular USB modems to ensure better coverage, reachability and cost efficiency. Routing over the multiple network interfaces can be setup for least cost routing. The PTT box can also route data e.g. from a PC connected via a standard Ethernet interface.
A vital part of the system is the BGAN terminal. All EXPLORER BGAN terminals can be used depending on the environment in which the PTT box is deployed. If the PTT box is mounted in a vehicle the EXPLORER 727 or EXPLORER 325 would be the right choices. The BGAN terminal ensures reliable communication in rural areas where no 2G/3G/GPRS network has been built or if existing 2G/3G/GPRS networks is congested or lost due to natural disaster, extreme weather etc.
EXPLORER Push-To-Talk server infrastructure
The heart of the system is the PTT servers. A server setup initially consists of two standard 19” rack servers that can be placed anywhere connected to the public internet:
The PTT server can handle any number of users, while the transcoding server can accommodate 20 concurrent calls, more transcoding servers can be added when the need arises. All information is stored in the PTT server including:
Dispatch client software
The Dispatch client software is a combined PABX switchboard and VOIP softphone. The software runs on a standard PC and the dispatcher uses a headset to communicate with the PTT box users in the field. Through the dispatch client software, the dispatcher can
Dimensions ( H / W / D ):
CE, GMPCS, FCC
1 x LAN interface:
1 x I/O interface:
Connector type: 15 pin D-SUB containing Loudspeaker output, Audio in, Audio out, PTT in, PTT out, serial port, 4-wire E&M interface.
2 x USB:
Connector type: USB host for Cellular Modems
1 x Microphone:
Connector type: 12 pin connector for the EXPLORER 6205 Control Speaker Microphone
Handset (CSM): Power On/Off, PTT button, 4 control buttons, 40x30mm Display, Jog wheel selector, Dimmer (display backlight)
Inmarsat BGAN Monthly Subscription Plans
- $50 Activation Fee (Waived for Platinum and Titanium Plans)
- Streaming services available for all plans; appropriate equipment required.
- Flex Plan is restricted to land use only.
- South America consists of Argentina, Belize, Bolivia, Brazil, Chile, Colombia, Costa Rica, Ecuador, El Salvador, French Guiana, Guatemala, Guyana, Honduras, Mexico, Nicaragua, Panama, Paraguay, Peru, Suriname, Trinidad & Tobago, Uruguay, and Venezuela.
- Southern Africa region consists of Botswana, Lesotho, Mozambique, Namibia, South Africa, Swaziland and Zimbabwe.
Inmarsat BGAN Prepaid Airtime
- Vouchers may also be used for voice calls
Other BGAN Airtime Services
How much is a MB?
When you send and receive emails, transfer files or pull up web pages – you are transferring data. All the data that you send and receive online can be broken down into megabytes (MB’s). It is difficult to provide an exact conversion of data type to MB, because everything thing you send and receive is unique and may be either large or small, but we can provide a pretty good estimate based on typical usage. A MB is approximately 99 plain text emails, 3 emails with attachments, 5 web pages or 1 digital photo.
To speak with someone about choosing the best BGAN option for your needs please call 305-405-7173.
|Coverage Areas||North America, South America, Europe, Asia, Africa, Australia|