MiRO’s LigoWave provides reliable backhaul solution to Bundu NetworX

Bundu NetworX specialises in the construction of high sites and long distance wireless links in the KwaZulu-Natal Midlands area, covering Nottingham Road, Kamberg, Loteni, Mooi River, Mount West, Lidgetton, Balgowan, Lions River and parts of Dargle. BUNDUNET builds its network infrastructure by deploying redundant rings and using a dynamic route distribution protocol that connect the high-sites to avoid downtime in the event of a link failure.

The company promises its customers fast, secure and reliable internet access via wireless technology and therefore requires hardware and software that will offer maximised throughput and minimised downtime.

Brian Olson of Bundu NetworX says that the primary problem faced by the company is the lack of a reliable backhaul. “We service over 700 customers and implement customised solutions for a number of hotels in the Midlands. Our commitment to our customers is maximised uptime and minimal line interference. Due to the lack of a fibre network in the immediate vicinity, this is difficult to achieve.”

There are a number of other challenges faced when operating in a rural area, including lack of adequate continuous power supply. This necessitates the adoption of solar powered solutions as one is unable to repeat voice and data without power.

Olson says that his company has been a client of wireless IP convergence company MiRO since 2006 and has used a number of its outdoor wireless products. “We took a proactive approach to the issue of mitigating the stolen Telkom ADSL lines by moving to a fibre-based solution. This required building a fibre optic backbone, as the nearest existing link is situated some 80 kilometres away. We decided to upgrade to a LigoWave carrier class backbone that would afford us higher throughputs, with less interference.”

On advice from the MiRO team, the LigoWave license-free PTP LIGOPTP 5-23/5-N MIMO device was selected due to the fact that it delivers aggregate TCP throughput capability of up to 180 Mbps (90 Mbps full-duplex) combined with high packets-per-second performance.

“This product enables carrier class point-to- point capability, which is ideal for dedicated access or backhaul applications as per Bundu NetworX’s requirements. Not only does it provide the desired throughput, but is also housed in a rugged, cast aluminum enclosure, suitable for the wet conditions often experienced in the KZN Midlands,” says MiRO product specialist Izelle Ackermann.

She explains that the LigoPTP 5-23/5-N MIMO has an array of advanced software mechanisms that provide optimal point-to-point connectivity for high-throughput over long distance links. “Because LigoWave’s proprietary PTP mechanisms use techniques such as Dynamic Time Division Duplexing (TDD) to dynamically allocate bandwidth in the direction needed, we were able to increase the link efficiency for Bundu NetworX and decrease the negative impact that distance has on throughput of the link.”

Another advantage of using LigoWave technology on point-to-point transmission is the inclusion of selective repeat ARQ technology. This enhanced error-correction software mechanism allows Bundu NetworX to optimise high data traffic throughput over high-bandwidth long-range links, even in the presence of interference.

Olson says that the project, which included the fibre acquisition and development of two high sites, was quickly implemented over a three month period. “We are extremely pleased with the performance of the 80 km link, with minimal interference and excellent throughput. As the project progressed we implemented a number of minor hardware and software changes and we now have a system that provides our clients with an uninterrupted data transmission service.”

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