User's Manual

Exalt Communications, Inc.
Exalt i-Series Installation and Management Guide
5000001 30
2007-04-15
• Impact on throughput and latency relative to link distance, occupied bandwidth, and
TDD frame size setting, and the planned implementation of these parameters
Familiarization with i-Series Radios
The i-Series radios utilize time division duplex (TDD) radio transmission. This means
that the transmitted signal in both directions uses the same center frequency and transmits
in one direction for a period of time, and then in the opposite direction for another period
of time. This total period of time is referred to as the frame length or TDD frame length,
and is further discussed in
Time Division Duplex (TDD) Factors on page 37.
The two radio terminals are identical hardware, except for the TDD setting in software.
When the radios are in their default state, both radios are configured as Radio B. One end
of the link must be configured as Radio A before the two ends of the radio system
can communicate.
It can be considered that Radio A is the primary radio in the link. Radio A provides the
master clock and control to Radio B. For most applications, it is not important how the
radio link is oriented, only that one end is configured for Radio A and the other for Radio
B. For some applications (such as, multi-radio hub sites or repeaters), the orientation of
the radio systems may be more critical. See Link Orientation and Synchronization on
page 38 for details.
There are three ways to configure the radios for Radio A/B determination:
1. Use the Exalt browser-based graphical user interface (GUI) – preferred.
2. Use the temporary hardware configuration key, in case of emergency (all models
except for -16 models).
3. Use the front panel DIP switch, in case of emergency (-16 models only).
Exalt recommends using the Exalt GUI for radio configuration. This interface requires a
computer with an Ethernet port and web browser software, such as Microsoft Internet
Explorer 5.0 or above. See Configuration and Management on page 66 for details on how
to connect to and use the browser-based GUI interface.
Standard models: The temporary hardware configuration key can be used when no
computer is available to complete Radio A/Radio B configuration and there is a need for
immediate bench testing or initial link installation and/or antenna alignment. See Radio
A/B Configuration on page 38 for details on the temporary hardware configuration key.
-16 models: The front panel DIP switch provides a fast temporary means for Radio
A/Radio B configuration. See
DIP Switch Settings (-16 Models Only) on page 128 for
details.