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Farm Tech
Internet access in rural areas
Making the most of inadequate phone lines
Telecoms had a lot of bad press about its rural telephone services.
Its not surprising, when 54 per cent of rural users surveyed by MAF say they have telephone
line problems. For those living more than 30 km from town, the figure grows to 82 per cent.
Modern data transmission systems are particularly sensitive to line noise. Unlike the human ear,
which is able to select the speech signal from any background noise, data systems such as computers
and faxes detect line noises as errors, either slowing down the data speed or completely disrupting
a call.
Around 35,000 New Zealand phone lines currently do not have basic internet access. However, the Government
is using its Kiwi Share to make sure Telecom upgrades its data service so that 99 per cent
of residential lines will have a basic internet service with a data transfer rate of 9.6 kilobits per
second. The 22,000 lines that will get much better internet access are mostly in rural areas. This will
leave 13,500 lines without this service.
Telecom is also going to remove the last 200 party lines and make its network 100 per cent digital.
Sources of interference
Major sources of telephone interference come from electric fences, electrical wiring and appliances.
Electric fences
If you have clicking on your phone
- Dont run energised wires or fences closer than 10 metres to telephone lines or cables for
long distances
- If possible, arrange your fence so the power source is at the end furthest from any telephone cables
- If you think there are underground phone cables running through your farm, dial 124 and ask Telecom's
Cable Location Service to send you a free plan or aerial photograph showing their location
- Use joint clamps or figure eight knots when joining wires and keep wires clear of vegetation and
other sources of shorts
- Use porcelain or Glass Reinforced Plastic (GRP) insulators. Polythene pipe insulators don't last
long
- Use a modern electric fence energiser complying with AS/NZS 1044. Units made before 1988 are more
likely to cause interference problems
- Earth in moist soil or, in droughty soils, include an earth return wire in the fence
- Ensure electrical earths are at least 10 m away from electric fence earths
- Check your energiser is not faulty. If you get bad interference, try it with the earth and fence
leads disconnected. If that doesnt help, plug it into another power point and try again. Still
no luck? Send the energiser in for servicing
- If nothing seems to fix the interference, convert your premises wiring to Telecom's 2-wire standard.
This offers improved performance in the presence of electrical noise
- Talk nicely with your neighbours and ask them to go through the same process
Electrical wiring
Do not
- Run electric fences parallel to power lines or cables for long distances
- Run phone lines and power cables in a single conduit (to the woolshed, for instance). They should
be at least a metre apart
If you have had internet connection/disconnection problems in the past, try the following before
logging on
- Disconnect any cordless phone units from the same circuit
- Disable call waiting
- Slow your modem speed 56 K is too high for most rural phone
lines. You can go as low as 9 K without seriously affecting internet
use. General modem advice can be found on Telecom's Xtra Help pages,
at http://help.xtra.co.nz/help/0,1324,Help:Modems:,00.html
particularly the articles on Adding an initialisation (init) string
in Windows 95/98 and How to force a modem to connect at
9600bps
- Turn-off mobile phones and CD radios, or keep them well away from your phone wiring
- Check the jackpoint and your phone lead for green corrosion. They dont last forever, especially
in damp or humid rooms
- Get an internet-compatible phone lead to plug into your computer from your computer supplier or
Dick Smith Electronics. The one off your phone may not be suitable
- Ring your Internet Service Provider (ISP) for advice
- If all else fails, try changing your ISP. Some appear much easier to connect with than others
Other interference
If you have noise (other than electric fence clicks) on your phone
- Your appliances (fridges, freezers, electric jugs etc) may be faulty. Disconnect them one by one,
to see if it makes a difference
- Your house wiring may be faulty. Try turning off lighting and heating circuits by disabling fuses
one by one
- Avoid long extension leads
- It might be your hot water ripple switch (bursts of static from faulty ripple switches are enough
to disconnect an internet session)
- Check your phone. How old is it? Look for a green tick Telepermit sticker on the bottom
If you have problems with fax transmissions, try sending a fax to Telecoms self-testing fax
checking service. Tel 0800 108 208. It will diagnose your machine and let you know of any adjustments
you need to make.
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