Mila builds Iceland telecommunications infrastructure with 6K switches

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Mila operates and maintains a number of different telecommunications systems, including SDH, DWDM, xHDSL and microwave links. These different systems are located in both urban and rural areas around Iceland in numerous locations. To provide effective control and management of these systems, Mila has established an Ethernet network. With the goal of building in maximum flexibility, Mila built a Layer 2 network with VLAN (Virtual Local Area Network) technology to provide segmentation between the different telecommunications systems.

To establish a reliable network, Mila determined that only the most rugged and reliable of Ethernet switches would suffice, with much of the equipment located in remote areas and subject to extreme temperature variations.

To meet these requirements, Mila turned to GarrettCom Europe, one of the world’s leading manufacturers of industrial and carrier-class Ethernet LAN products. GarrettCom Europe supplied a number of its 6K32T managed switches for test purposes, as well as on-site training.

Download application note: Mila builds Iceland telecommunications infrastructure with 6K switches [PDF]

 

Bell South utilises GarrettCom NEBS certified Ethernet switches for database system

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As Bell South’s number of subscribers and their wireless call volume has grown, the need for increased capacity and redundancy in the HLR private WAN has grown also. Historically, a 16-port 10/100 Ethernet hub had been sufficient at each HLR centre. However, the need for multiple 8-port Ethernet switches at each site to break the HLR LAN into multiple redundant pieces was now required. The newly specified switches needed to operate from redundant –48VDC power sources, and have NEBS certification. This was necessary because they were to be installed for mission-critical applications and could not risk the chance of hardware failure.

Bell South selected 4K8R Ethernet switches for the HLR LAN facilities because each is configured with a dual-source –48VDC power supply, and could be reverse mounted in 23” Telco racks. By having the “Reverse” model, that specific feature placed the connectors in the rear and the LEDs in front for a clean installation and convenient monitoring of status information, which in normal use is more convenient and logical for viewing. The high reliability (over 100k hours MTBF), low emissions (Class B) and NEBS certification more than fulfilled the stringent CO requirements and helped ensure the uptime of such services. With multiple 4K8s configured in a redundant HLR LAN at each location, increased reliability and greater interconnect bandwidth were achieved.

Download application note: Bell South utilises GarrettCom NEBS certified Ethernet switches for database system [PDF]

 

Valley Telephone uses DS8016 for microwave relay station network management

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Previously, Valley Telephone had installed commodity-class AC-powered Ethernet hubs, used in LANs for managing 3GB wireless radios and other equipment in their wireless facilities.

In order to operate the commodity hubs, they had to be powered by an inverter, drawing power from the high-availability DC source in the building and converting it to AC. The usage of inverters required additional rack space, increasing the cost of the application and reducing reliability since the inverters themselves introduced additional points of failure. Valley Telephone needed a solution; they desired a Carrier Class hub that had a –48VDC power supply built-in to eliminate inverters and to increase network management reliability. In addition, based on the history of repair and maintenance costs, it was apparent that operating costs also needed to be significantly reduced.

GarrettCom’s product line offered many excellent solutions for Valley Telephone’s Ethernet network management application.

Download application note: Valley Telephone uses DS8016 for microwave relay station network management [PDF]

 

3000 Series create a cost-effective LAN solution for Choice One Communications

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Choice One needed to find a reliable and cost- effective Ethernet LAN solution to manage varied CO equipment in their traffic-carrying system. They needed to choose products that would be NEBS certified and operate on -48VDC central office power to fulfil their customer’s requirements.

The GarrettCom line offers a wide selection of Ethernet products, NEBS Level 3 Certified, well established in carrier-class installations, known for reliability and quality, and approved for co-location by all major ILECs (Incumbent Local Exchange Carriers). Choice One chose the best solution for their network management facility - the 10Mb 3000 Series Stackable Hubs from GarrettCom for this application. Choice One selected models 3012 and 3024 NEBS-Certified Hubs, rack-mountable in 19” and 23” racks with –48VDC power supplies. This enabled Choice One to provide the Central Office network management via Ethernet LANs.

Download application note: 3000 Series create a cost-effective LAN solution for Choice One Communications [PDF]

 

Broadnet France selects GarrettCom carrier-Class Switches for wireless network management

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Broadnet France needed a compact, simple LAN switch to install in its remote base stations and on customer premises to support network-wide access for network management data. The company wanted to ensure that both centralized element managers and technicians on site would be able to communicate with every device for maintenance, management, and troubleshooting.

Because of the diversity of locations where the switches would be installed, Broadnet needed equipment that would operate using its available –48VDC power used by its telecommunications equipment, and that would tolerate industrial environmental conditions. Broadnet France turned to GarrettCom Europe to find a solution.

Download application note: Broadnet France selects GarrettCom carrier-Class Switches for wireless network management [PDF]

 

GarrettCom products bring the internet to hotel guests in San Jose

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As a growing number of subscribers who want faster services are added to networks, the requirement for new equipment is rapidly growing. Only through technology is it possible to add such services and increase bandwidth. So getting more equipment into the valuable CO space becomes a key benefit of advancements in equipment technology.

Guests at the Hyatt Sainte Claire and the Hyatt San Jose may be connected to the Internet via an Ethernet LAN in the hotel with a port in each room. No need for troublesome, slow dial-up lines. This service feature is a valuable differentiator from other hotels in the San Jose area. According to Virgil, hotel guests have frequently praised the Internet service to the front desk attendants upon checkout.

To network computers in the rooms on each floor together, Virgil selected GarrettCom 3000 series stackable hubs. These feature-rich hubs were configured with an SNMP agent to provide the necessary management, and were priced right!

Download application note:  GarrettCom products bring the internet to hotel guests in San Jose  [PDF]

   

Blade compact PCI Ethernet solution

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As a growing number of subscribers who want faster services are added to networks, the requirement for new equipment is rapidly growing. Only through technology is it possible to add such services and increase bandwidth. So getting more equipment into the valuable CO space becomes a key benefit of advancements in equipment technology.

The development team that GarrettCom put together designed a hub, dubbed Blade™, that is specifically made for rear- I/O in a cPCI chassis. It provides twelve 10/100Mb Ethernet ports in a single 6U card. In addition, the Blade model DS12 was designed as NEBS™ Level 3 compliant and with EMI Class B for low noise. It has excellent reliability, boasting over a 30-year MTBF. With the plan for minimum cPCI space as a key requirement, the Blade DS12 design fits into a single rear transition module.

Download application note: Blade compact PCI Ethernet solution [PDF]

 

San Francisco selects P62F hardened switches in traffic control

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Transdyn is responsible for the design, development, integration, commissioning, and support of the project requiring a number of Intelligent Transportation Systems (ITS) components to manage, control and operate the roadway. The new system integrates and automates various ITS functions such as warning gates, barrier gates, variable and changeable message signs, video surveillance, vehicle detection and verification, and traffic information dissemination.

The application uses multiple 100 Mb Ethernet rings using GarrettCom 6K16V managed switches to link the video cameras, with each of the rings connected to a Gb backbone link to the TMC.

Download application note: San Francisco selects P62F hardened switches in traffic control [PDF]

   

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