Internet Service Restored with High Capacity 70 GHz Link
Cable AML has installed a high-capacity IP Link operating at 70 GHz to provide Internet service during the COVID19 Emergency to a number of Cable TV subscribers in Northern California.
The link provides Internet service to an area that was difficult to reach with conventional fiber or cable. Service was restored following an emergency deployment of Cable AML personnel to establish wireless connectivity between the main Server and the local Node
High Capacity IP Radios Installed in California
Cable AML has recently installed a high capacity IP link operating in the 24 GHz “licensefree” to provide backhaul connectivity between two major facilities near the Los Angeles International Airport, in Los Angeles, California (USA).
The microwave link was the wireless leg of a completely updated network interconnection project designed and installed by Cable Masters for a Corporate customer. Cable Master is a California company with state-of-the-art capabilities in the design and construction of wired and wireless projects worldwide.
The 24 GHz IPLINK is able to provide 750 Mbps (full-duplex) which enabled Cable Masters to provide seamless connectivity between two major network nodes which were difficult to interconnect by fiber.
According to Cable Masters Vice President Hiroki Shimamura, “this wireless link has made it possible to robustly interconnect two network nodes with maximum efficiency without having to recourse to a very costly fiber run. Cable AML’s equipment and service has made the installation easy and has made it possible to save significant time and cost on the overall project”.
Gigabit 70KM IP Link Installed in Honduras
Cable Color, the leading Cable Operator in Honduras, has recently installed a Gigabit microwave link covering a distance of 70 Km over the ocean.
The link provides ultra-high capacity IP connectivity between the mainland and the island of Roatan, off the coast of Honduras. Operating in licensed bands, it replaces older lower capacity links that were operating in the license-free band but that were prone to downtime due to interference and other issues.
With a capacity of 1.5 Gigabits, the full duplex link can be operated in the “link aggregation” mode or in the hot-stand by mode depending on traffic conditions.
Cable Color performed the installation and commissioning of the link, including the mounting of 2,4 meter diameter antennas at a tower height of approximately 80 meters.
According to Maynor Amaya, head of data engineering at Cable Color, “the link performance has surpassed all of our expectations and we are very pleased to be able to provide an extremely reliable service to our customers.”
Time Warner Upgrades High Data Rate Microwave Trunk
When Time Warner needed to increase data transmission speed between its headends at Libby and Troy, Montana, Cable AML came up with the perfect solution. Cable AML designed an 18GHz bidirectional transmission system between the Libby and Troy headends through a repeater site on King Mountain. The previous system data interconnect delivered a capacity of 24.7 Mbps, transmitted over sixteen T1 lines.
The new transmission system provides a rate of 80 Mbps and can be increased to 155 Mbps by changing the modulation format through a software upgrade from 16QAM to 256QAM. King Mountain posed a more formidable challenge than spanning the 18 mile distance between the two headends. The 4,160 foot high mountain stood directly between the two microwave towers.
Dense forests of mostly mature, fir trees covered the high and low lands in between. In addition, snow and ice accumulations remain on the mountain for much of the fall, winter and spring. “Even in June the weather impedes access to the King Mountain site, so the job was completed in July after clearing some of the trees that were blocking the path”, said Ted Chesley, Sr. Microwave Field Engineer.
According to Corey Robertson, Network Engineer of Time Warner, “The high-capacity link is by far the most economical and best performing solution for high data rate trunking between remote headends.”
Time Warner Updates 5.8 GHz IP LINK
US Cable Operator Time Warner has recently installed a 6 GHz licensed IP microwave link (IPLINK) between the top of Haleakala mountain and the city of Hana. The link is an upgrade of an existing 5.8 GHz spread spectrum link to improve high-speed data (HSD) service to the city of Hana on the island of Maui (Hawai, US).
Cable AML performed the link analysis and provided the electronics, antennas, and related hardware for this project, as well as alignment and turn-on engineering assistance. The link to Hana from atop the Haleakala volcano is challenging due to the long distance and the fact that there is no direct LOS (line of sight). The connection is established via a double passive reflector (billboard) in the path. Time Warner is using the same reflector and path to transmit signals at 13 GHz, 18 GHz and now 6 GHz, all implemented with Cable AML systems.
The isolated town of Hana receives Cable TV signals (54 to 870 MHz) from the main Headend in Maui. The transmission path starts with fiber to the top of Haleakala, from where it is transported via 13 GHz and 18 GHz broadband microwave links. Microwave is the only feasible and economical way to serve this small community. The 6 GHz IP Link provides a return path for the subscriber cable modems.