Main communication tower in Port Moresby where the Base Station Sector Antennas are installed. In conjunction with several repeaters, the four sector base station provides high-capacity data connectivity to high value customers.

According to Greg Morgan, Technical Director of Hitron, “the system is providing excellent connectivity and is allowing Hitron to triplicate its data connectivity capacity

The system provides subscribers with basic IP connectivity with a wireline-like user experience and it allows Layer 2 VPN or Carrier Ethernet services for business and enterprise users. The system’s modular approach allows for gradual deployment to maximize bandwidth availability over specific areas of high concentration of customers.

San Miguel is the second most important city after the capital, San Salvador. With a population in excess of 200,000 people, it is located 138 km east of the capital and it is also the capital of the Department of San Miguel.

INTERCOM was the first company to install and operate a broadband wireless system in Central America. The wireless DOCSIS system has been in continuous operation in El Salvador since 2002.

According to Miguel Mata, INTERCOM Operations Manager in El Salvador, “The Cable AML transmitter was installed the same day it was received and has been working perfectly since day one.”

Cable AML’s BWA-2002 system provides IP-based high throughput data service between a centrally located base station and a number of subscriber stations. Because of the Point-to-Multipoint architecture, service to additional customers can be easily provided by simply adding additional remote units.

The system’s base station was installed at the same site planned for an MMDS system and shares the same transmitter and antenna.The system shows how wireless data systems can provide path redundancy to critical fiber data links in dense urban environments where frequent construction activity is likely to result in interruption of service due to fiber cuts.

The BWA-2002 is one of several systems in the BWA-2000 family of Broadband Wireless Systems developed by Cable AML. Other models operate in the 3.4 to 3.6 GHz and 10.15 to 10.65 GHz bands.

The BWA-2002 is designed to operate within the standard MMDS channelization scheme, where the available spectrum is sub-divided into 31 channels, each 6 MHz wide. Each individual channel can be assigned for either down-stream data transport or TV distribution.

Each downstream channel can provide a data throughput of 30 Mbps with 64 QAM modulation format, or one standard VSB-AM NTSC analog TV program (PAL/SECAM programs can be implemented with a different channel plan).

Upstream transport is implemented by multiplexing 3 carriers for every 6 MHz of available bandwidth. Each QPSK-modulated carrier has a nominal bandwidth of 2 MHz and provides an upstream data throughput of 2.56 Mbps.

The BWA-2002 consists of three key subsystems: the headend, the RF transceiver/antenna, and the Customer Premises Equipment (CPE).

The headend typically houses one or more modems (HMTS or Headend Modem Termination Systems), an SNMP-based integrated Network Management System, and a QoS (Quality of Service) module. Each HMTS can service thousands of subscribers and provides three full-duplex (bi-directional) Ethernet 10BaseT data interfaces to a switched hub. The 10BaseT ports on the switched hub provide direct connectivity to local headend servers and access to Internet and remote servers via a router.

The RF transceiver/antenna configuration is determined by the system requirements, and can be either co-located with the data equipment or remotely connected via wireline or microwave STL.

The CPE equipment includes an integrated antenna/outdoor transceiver and an indoor modem.

Cable AML is a leader in the development and implementation of Broadband Wireless Access Systems. In fact, the BWA-2000 access platform is only one of four access platforms developed over the last two years.

Our complete Broadband Wireless Access Product Line makes it possible to match the optimum platform to each customer’s requirement. Contact Cable AML Sales for further information.

Univisa’s technical staff planned and executed the system upgrade with DOCSIS wireless technology and components provided by Cable AML.

The system started service utilizing one channel pair but was designed for expansion until the full bandwidth available is fully utilized.

According to William Arcentales, Univisa’s Engineering Manager in charge of designing and implementing the system, “this system has allowed Univisa to provide first-class wireless Internet service to all areas of the city in a record time and without disruption of the digital TV service. We are very pleased with the equipment and assistance provided by Cable AML.”

With the new two-way repeaters, TV subscribers in the coverage areas will also be able to subscribe to wireless Internet service.

Cable AML’s 10-Watt two-way repeaters provide TV and Wireless Internet service in an area of several kilometers radius. According to Carlos Esteche, “The repeaters were real easy to install with practically no interruption to the TV service.”

The new system allows HITRON to offer high speed Internet service to the same footprint of TV subscribers served by the existing digital MMDS system, using the existing transmitter and repeaters.

The system upgrade involved integrating the Base Station DOCSIS equipment to the existing transmitters and implementing an upstream return path.

Subscribers have the option of using two-way transceivers allowing for simultaneous digital TV and wireless Internet service in remote areas of Papua New Guinea.

It was particularly important to HITRON to be able to use existing MMDS repeater sites and infrastructure because of the high cost of acquiring, commissioning and maintaining repeater sites in remote locations.

According to Greg Morgan, VP of Engineering at Hitron, “The modular design approach proposed by Cable AML for our system has allowed us to upgrade with minimum disruption of service to our customers while modernizing our wireless plant and adding significant revenue potential.”

A Cable AML Indoor, 200 Watt Transceiver at the base station transmits digital data carriers from an existing Cable TV headend nearby. The transmitter output is routed to a 200 foot transmission line that feeds an omnidirectional antenna mounted at a height of 180 feet at the top of a transmission tower. The MMDS system transmits five digital PAL B/G DVB carriers, or a total of 40 TV programs modulated with 64-QAM. The DOCSIS wireless downstream carrier is also modulated at 64 QAM

Customers use either Downconverters or Transceivers. Downconverters accommodate TV-only reception while Transceivers deliver TV plus Internet service simultaneously. According to Humberto Barros, “The commissioning of this system is giving us the capability of substantially expanding the service footprint to areas previously not accessible to us.”