User's Manual

Exalt Communications, Inc.
Exalt i-Series Installation and Management Guide
5000001 38
2007-04-15
disabled, if necessary, is the highest port number, such as Port 4 for the
standard models, and Port 16 for ‘-16’ models (assuming that all 16 TDM
interfaces are licensed for use). See T1/E1 Configuration Pages on page 83
for more information.
Link Orientation and Synchronization
Link orientation refers to the Radio A and Radio B placement in your network. Link
synchronization refers to using external or internal timing to coordinate multiple links.
For every link, one end of the radio link must be configured as Radio A, while the other
end is configured as Radio B. In single-link systems, it does not matter which end of the
system is mounted at which end of the link, and there is typically no requirement for any
link synchronization.
Link orientation and synchronization are more important for networks with site(s) where
there is more than one link of the same type or for sites using the same type of radio that
are very close to each another at one or both ends.
It can be advantageous to utilize link synchronization for collocated links. The radios
allow the use of an optional GPS synchronization kit or internal synchronization. This
synchronization controls the transmitter and receiver frame timing so that collocated
radios are transmitting at the same time and receiving at the same time. This can
substantially reduce the opportunity for self-interference. Without synchronization,
collocated radios may be transmitting and receiving at the same time, incurring near-end
interference.
Note: It is not always necessary to synchronize collocated radios. If
antennas are substantially separated or blocked from one another and/or
frequency separation tuning is used, the opportunity for near-end
interference can be eliminated.
Note: Internal and/or GPS sync features are not released for all models
as of printing. Contact your Exalt Communications representative for
details.
Radio A/B Configuration
Use the Exalt GUI to configure the radio terminals for Radio A and Radio B orientation.
Since many other parameters also need to be set, and the Exalt GUI is needed for these
configurations, this is the best way to completely configure the radio terminals.
Radios arrive from manufacture in default configuration, orientated as Radio B and
configured as shown in
Table 3.