The CFIP Lumina Series Full Outdoor Unit Technical Description and Configuration Guide
•
Rev. 1.3
•
© SAF Tehnika JSC 2010
41
Most of the time system would support a 366Mbps Ethernet connection instead of 69
Mbps connection. The system automatically monitors the link conditions and changes the
capacity without interrupting the data transmission (hitless changes), as shown in
Figure 4.3
.
Figure 4.3.
Link availability and classes of services
In comparison similar system using 256QAM and providing similar capacity would provide
only 99,687% of availability. Besides, lack of ACM would not provide higher availability. You
would have to decrease the distance, decrease modulation or increase antenna sizes to
achieve 99,995% availability for the given link.
This example demonstrates how the new technology, based on an ACM mechanism, can
play a key role in the development of cost-effective next-generation wireless access
networks, by taking advantage of traffic evolution from synchronous TDM traffic to packet IP-
based traffic.
The
FEC
mode (Weak or Strong) allows increasing overall capacity of the link in terms of
deteriorating RSL sensitivity threshold.
For more details refer to table in
Section 1.6
.
4.1.4 Loopback Configuration
Loopback tests are accessible using local or remote management methods.
For safety purposes all loopbacks (local and remote) can be set on a fixed time interval
only. If no time interval is specified, the default value is 60 seconds (1 minute).
Figure 4.4.
Loopback modes