This presentation by Bo Jansson and Mikael Lindahl is an integral part of the Westermo webinar: https://www.westermo.com/news-and-events/webinars/copper-as-an-alternative-to-fibre

1. Robust Industrial Data Communications – Made Easy
Copper cables as an
alternative to fibre
Bo Jansson
Mikael Lindahl

2. 2
Emergency phone
 Application
 Network along the road to connect the IP
emergency telephones and IP cameras to
the central station.
 Location
 Denmark
 Products
 DDW-225
 Why Westermo
 Upgrade from multidrop modems to IP
 Reuse of old copper cables
 IP based communication
 Increased bandwidth

3. 3
Cable alternatives
Fibre
Distance up to120 km (75 miles)
+ Lightning protected
+ Low attenuation
+ High bandwidth
- Expensive contacting
- Demanding installations
- Dust sensitive
Twisted pair
Distance up to 15 km (9 miles)
+ Existing cables can be used
+ Low cost
+ Simple installation
- Low bandwidth
- Sensitive towards surge and lightning

4. 4
SHDSL (Single-Pair High-speed Digital Subscriber Line)
 Full duplex on a single twisted pair
 DSL technology
 International standard–G.991.2
 Symmetric (uplink/downlink)
 Line speed up to 30.6 Mbit/s (with
bonding)
 Distance up to 15 km (9 miles)
 Point to point
 Transparent  Plug and play CPE initiates the
connection with the CO
 Speed is negotiated based on line
characteristics
 Quality of the line is measured through
SNR (Signal to Noise Ratio) dB
CO
(Central office)
Responder
CPE
(Customer Premises
Equipment)
Initiator

5. 5
SHDSL – things to consider
 Strive to always use twisted pair cables
to avoid crosstalk.
 Twisted pair also reduce interference
from other signals since the pair is
balanced.
 Cable area > 0,3 mm2 (AWG 22)
 If external surge and lightning protectors
will be used, make sure they have the
right characteristics.
In some legacy situations, cables were
designed to carry simple switched DC so
there was no need for twisted pairs.
Will it be possible to use this type of cable?
These lines will be prone to pick up more
electrical noise than a twisted pair, due to
the pair used being unbalanced.
This cable may work but it needs to be tested,
data rate and reach will be reduced.

6. 6
How can I quality assure my connection
 Measure the line quality through the
SNR value.
 Test different pairs and choose the best
ones.
 If possible, perform long time test.
 If possible, do not use a pair close to
other used pairs.
 After test, use the same pair at
installation
 If shielded cable is used connect earth
only to one end of the cable.

7. 7
How to measure SNR?
DDW-142 and DDW-242 have LED
detection on the front measuring SNR in
steps of 3 dB.
 SNR< 3dB this cable is not reliable,
try another pair.
 SNR 3 to 5 dB this cable will work but
we recommend you to try to improve
the SNR value.
 SNR 6 to 9 dB this connection will
work connectivity can be guaranteed.
 SNR> 9 dB high quality connection.

8. 8
How to measure SNR?
DDW-142 and DDW-242 have LED
detection on the front measuring SNR in
steps of 3 dB.
 SNR< 3dB this cable is not reliable,
try another pair or other cable.
 SNR 3 to 5 dB this cable will work but
we recommend you to try to improve
the SNR value.
 SNR 6 to 9 dB this connection will
work connectivity can be guaranteed.
 SNR> 9 dB high quality connection.
Our configuration tool WeConfig have more
advanced measuring features.
DEMO

9. 9
How can I secure my SHDSL connection?
 Wide range of security functions in
WeOS for robust and reliable
network security
 Encrypted SHDSL communication
 Made easy configuration
 Vulnerability management
 Dedicated security team

10. 10
Calculate distance and bandwidth
The WeConfig reach calculator will
help you to determine possible speed
and distance on a cable.
SHDSL White paper

11. 11
SHDSL Ethernet Extenders
Applications
DDW-120
DDW-142
DDW-242
DDW-225
DDW-226
FRNT

12. 12
Robust Industrial Data
Communications – Made Easy