View Full Version : V-COMM Microwave links...........

2008-10-05, 07:04 AM
<table width="94%" border="0"><tbody><tr><td>• A VSAT (Very Small Aperture Terminal) is used to communicate
via satellite. It can be used to communicate any of the following:<br>
– Data<br>
– Voice (VoIP)<br>
– Video<br>
– Audio<br>
• VSAT Equipment consists of
an Outdoor Unit (ODU) and<br>
an Indoor Unit (IDU) and connecting cables<br>
<strong>Equipment</strong> <br>
• Outdoor Unit (ODU)<br>
– 1.2m parabolic Antenna<br>
– 2 watt Radio<br>
Frequency (RF) Unit<br>
• Indoor Unit (IDU) HughesNet Modem <br>
• Data: HN7000 – Length/Depth 27cm, Height 22cm and
Width 4cm<br>
• Voice: DW6040 –Voice Appliance (VAP). Has 4 voice
ports and comes as an additional module
to the Data Modem </td>
<td><img src="http://www.softnet.mw/index/vsat_explanation.gif" usemap="#coverage" width="381" border="0" height="230"></td>

<strong>KU Band Vs C-Band</strong> <br>
• Softnet operates in Ku-Band frequency.<br>
• Previously, C-Band services were more popular than Ku-band due
to susceptibility of Ku-Band to weather conditions such as
rain and fog.<br>
<strong>Why Ku Band?</strong><br>
• Smaller antennas are required. Less radio power is required in
Ku-band than C-band to provide the same signal strength.<br>
• Cheaper :Ku-band equipment is 3 times cheaper than C band.<br>
• Aesthetically better : A typical Ku-band antenna is 1.2m or 1.8m
and a typical C-band antenna is 1.8 or 2.4m<br>
• Softnet’s availability is 99.7% with ACM and AIS.<br>
Ku-band terminals are in wider use worldwide than C-band
The majority of users accept a 0.4% difference in availability
upon consideration of the initial capital investment required.