All telecommunications infrastructure across the country is fully backed up with standby generators, said Telecom Namibia, in the event of anticipated load shedding as the electricity crunch is increasingly becoming a dreaded reality. Minor sites, said the company, have enough battery autonomy to cover three to five hours of power outages.
These sites will be closely monitored during outages. "However, it is not covering the customer premises, and as such, any electricity outage or load shedding exercise is likely to affect telecoms services starting from your cordless phone, answering machine, private branch exchange, ADSL modem, WiMAX modem or any other network terminating unit that requires power," Telecom warned.
In these instances, it said, a lack of emergency standby power generation within customer premises will be the primary cause of service interruptions. The company has put in place disaster management protocols. This will mean that its core network and systems will be comprehensively covered by back-up power supply, which will enable it to function normally. All fixed telephone services, which rely on Telecom Namibia's exchange power over copper lines, will work during outages.
However, the wireless digital communications system, WiMAX [Worldwide Interoperability for Microwave Access], ADLS [Asymmetric Digital Subscriber Line], MGW [MultiGain Wireless], DECT [Digital Enhanced Cordless Telecommunications] and IP [Internet Protocol] router services will be affected because these systems or modems use power supplied by local authorities through the REDs. Switch mobile services should not be affected due to availability of standby power to base station sites, and handsets should be recharged at regular intervals to remain active.
telephones that depend on alternating current (AC) power will be off during outages. The network terminating units (NTs) for ISDN services will also be affected, but the basic telephone service on the NT will function.
PABX [Private Automatic Branch Exchange] systems connected to AC power will also be affected by outages if these are not powered from the UPS [Uninterrupted Power Supply] systems of customers.
Big PABX systems would have to source their own back-up power systems, such as a back-up battery with an external UPS, Telecom Namibia advised.
Source: allafrica.com
Thursday, February 28, 2008
Tuesday, February 26, 2008
Islands of Fibre
There are many examples in the UK and in other European countries that demonstrate how seperating the provision of the access infrustructure from the provision of services is a significant key to solving the challenge of investment in fibre as a replacement for local copper networks.
It is inevitable that there will be for some time 'islands of fibre' in much the same way that five years ago we had islands of ADSL provision. This time however the gap in economic advantage between the haves and have-nots will be even greater.
There is no need for a '1-size fits all' approach - especialially if that '1-size' is defined by those with narrow minds. And with sensible regulation focused on interoperability and carrier neutrality there is no need to worry about new forms of localised monopolies. Open Access means that these networks are open to any service provider and in the best examples customers can switch providers just like changing channels on your TV.
Source: zdnet.co.uk
It is inevitable that there will be for some time 'islands of fibre' in much the same way that five years ago we had islands of ADSL provision. This time however the gap in economic advantage between the haves and have-nots will be even greater.
There is no need for a '1-size fits all' approach - especialially if that '1-size' is defined by those with narrow minds. And with sensible regulation focused on interoperability and carrier neutrality there is no need to worry about new forms of localised monopolies. Open Access means that these networks are open to any service provider and in the best examples customers can switch providers just like changing channels on your TV.
Source: zdnet.co.uk
Japan launches high-speed communications satellite
Japan may already enjoy one the fastest internet speeds in the world, but that isn’t stopping the land of the rising sun from further distancing itself from everybody else in terms of bandwidth. Powered by a rocket designed and built in Japan, they’ve just launched a new satellite designed to provide “super high-speed data transmission” at home and in Southeast Asia.
The satellite, dubbed Kizuna, will reportedly be able to provide broadband internet connections to homes with download speeds of up to 155Mbps and upload speeds of 6Mbps, whereas commercial users with 5 meter antennas can tap into 1.2Gbps download speeds – that’s about 150 times the average high-speed ADSL connection rate of 8 Mbps, or 12 times faster than fiber optic wires.
Kizuna will be operational in July and its goals include improving rural broadband and increasing opportunities for remote education and telemedicine throughout Japan. It will also serve as a back-up network should terrestrial communications be disrupted by a major earthquake.
Source: techspot.com
The satellite, dubbed Kizuna, will reportedly be able to provide broadband internet connections to homes with download speeds of up to 155Mbps and upload speeds of 6Mbps, whereas commercial users with 5 meter antennas can tap into 1.2Gbps download speeds – that’s about 150 times the average high-speed ADSL connection rate of 8 Mbps, or 12 times faster than fiber optic wires.
Kizuna will be operational in July and its goals include improving rural broadband and increasing opportunities for remote education and telemedicine throughout Japan. It will also serve as a back-up network should terrestrial communications be disrupted by a major earthquake.
Source: techspot.com
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